Butterfly Expo

I believe that everyone will inevitably come into contact with composition, especially expository writing, which occupies an important position. The content of the explanatory text is highly scientific and the language is rigorous and accurate. What should I pay attention to when writing this composition? The following is my butterfly explanation, which is for reference only. I hope it will help you.

Butterfly Description 1 There are many kinds of flowers, but my favorite is the beautiful butterfly orchid.

The petals of Phalaenopsis are rose-red, with a little white in the middle and a circle of white around it, like a rose-red dance skirt with white lace.

I feel like a Phalaenopsis dancing with other Phalaenopsis. Several butterflies joined our team and danced with us. After a while, the butterfly flew away and we stopped dancing. A bee flew in and told me what it saw and heard today.

After a while, I remembered that I was not Phalaenopsis, I was watching Phalaenopsis!

Explanation of Butterfly 2 Most life in the world is short-lived. Butterflies also belong to Mayflies, but they are still dazzled by their colors. Because all the mysteries and beauty of life reveal all the answers in pain and instant transformation. -inscription

Pupation, cocoon formation, emergence, and flash in the pan ... This is the reincarnation of butterfly life as we all know, but who can understand the painful transformation behind this beauty?

Sanmao, a city girl who divided books, waved her personality in the text. Nowadays, Sanmao has attracted much attention, but few people ask her about the process of transformation. San Mao once wrote in the book, "I thought that I was so far away at the age of twenty, and I guess I died before I lived to wear stockings." It is impossible for a teacher to understand the meaning behind a lipstick. Such a long wait is an endless tunnel without light. I have been stepping on the air and can't find the focus. Sanmao repeated the metamorphosis of butterflies again and again until she was thoroughly remoulded and revealed mysterious colors. Everything in the past has become a flock of butterflies. Although I have long understood that most life in the world is short, I am still dazzled by the color of butterflies. Because all the mysteries and beauty of life reveal all the answers in pain and instant transformation. I insist on it year after year, just for the color of the butterfly when it is regenerated.

Butterfly Description 3 In the flowers, don't be surprised if you see moving flowers. Because it's just a butterfly.

Butterfly has a curved beard on its head, small eyes, a sharp mouth below and a pair of wings beside its thin body.

This butterfly is very naughty. Once I was doing my homework and forgot to close the lid of the butterfly jar. Fortunately, I closed the window, so the butterfly couldn't fly out. After I noticed my homework, I picked up the net and started catching butterflies. First, I flew in the direction of the sofa. I chased it, and it was almost there. It suddenly made a 180 degree turn. Let me fall on the sofa and chew the mud. It started to take me in circles again, and I almost fainted on the wall. Then it started wandering around me, making me unable to move. Finally, I chased the butterfly for nearly half an hour and finally caught it.

However, it is also very smart! Once, I built a maze with building blocks that I couldn't get out of. Unexpectedly, it only took five minutes to fly out.

Butterflies have brought me a lot of happiness, so I must protect them in the future. You said butterflies are not cute!

Butterfly Description 4 Today, the teacher brought us a plant friend-Phalaenopsis.

The leaves of Phalaenopsis are a little different. They feel smooth and thick, and there are many dark green stripes on their leaves. If small insects sleep on leaves, they will be very comfortable.

Long green stems stand in the middle of smooth leaves, especially like small sticks supporting Phalaenopsis. Phalaenopsis is like a bow, like a fairy, more like a butterfly dancing in the forest, otherwise, how can it be called Phalaenopsis!

Phalaenopsis has more beautiful flower bones, which are as big as soybeans. The big flower bone seems to be bursting, and each flower bone is like a pink pearl, so cute!

I like Phalaenopsis. Do you like it?

After the heavy rain, I went out to get some fresh air. Raindrops are still hanging on the leaves, flowers have been beaten out of the water by heavy rain, and the grass hangs its head. Hey, what's that? It looks like a blank sheet of paper. A closer look turned out to be a dying white butterfly.

The white butterfly lay quietly in the grass, and there was still some rain on its wings, shaking and shaking. When I approached it, its tentacles moved. It may think I'm a bad person. I didn't expect this, but I can still be on high alert.

I looked at it. I think it was caught in the heavy rain just now. Thinking of this, it seems that a picture emerges in front of me: lightning and thunder, the sky is gloomy, and a white butterfly is trying to fly, looking for shelter from the rain. However, it was too late, and the raindrops as big as beans fell. It dodges left and right to avoid raindrops hitting itself, but the raindrops are so dense and big that they can't hide at all. It's a pity that it was hit by the rain, but it didn't flinch, but faced the difficulties. It flapped its wings desperately to prevent itself from falling. It tried to fly upward, even if it was hit by raindrops, it didn't bow its head. Finally, God should be moved by his perseverance. The rain stopped, the sun came out and the white butterfly won. At this time, a white butterfly slowly fell into the grass like a piece of white paper.

After imagining this picture, my thoughts came back to reality. The white butterfly looks better now. I moved it to a higher place with more sunshine, and then went home. On the way home, I remembered that the white butterfly is so fragile. What if someone catches it? As it turns out, I think too much. When I went back, there were no white butterflies in the original place, but in mid-air, there was a white butterfly that seemed to be practicing flying. It turns out that it can fly, and I can't help but admire it.

There are many beautiful things in the world, and the injured white butterfly is also beautiful, because it is brave and hardworking, and it has tenacious perseverance and fighting spirit. I think we should learn from it, never shrink back in the face of difficulties, persist in doing things, have perseverance and dare to struggle. In this way, we will one day be like a white butterfly, pushing aside the dark clouds and seeing the sunshine.

Butterfly Explanation 6 There is a beautiful insect living in this beautiful and mysterious nature, and that is me-butterfly.

Although we look small and lovely, we have a huge and surprising family, with more than 14000 races in the world. Most of our partners are in the United States, especially in the Amazon basin. Although the environment of the Amazon River is very suitable for us, my ability is limited ... I also have many different friends here, such as dragonflies and bees. These are my good friends. I will talk about them later. I want to talk about myself now. People say we are beautiful, but you know what? We have to go through a long and painful process to become like this. First, when we are still caterpillars, we will find a safer place to wrap ourselves up and grow quietly in pupae. Finally, when we hatch, we have to squeeze the liquid from our muscles into our wrinkled wings, and then we will work. This struggle is difficult!

Yesterday, I went to my friend Gary the Snail's home. He carries his home on his back every day and is not tired at all. When I went, he was crawling on a vegetable leaf and eating a big meal slowly, but he didn't say hello when he saw me coming. He is really too lazy to go home.

Do you still want to know about our world? That is to explore by yourself!

Today, the teacher brought a potted plant-Phalaenopsis.

This Phalaenopsis, from a distance, looks like a butterfly standing on a branch, a breeze blowing, and a group of pink butterflies dancing in the green leaves. Its leaves are green and thick, smooth to the touch and round in shape. This flower is pink and consists of three petals with a yellow stamen in the middle. If you come near and smell it, you can smell a fragrance.

I suddenly feel like a Phalaenopsis. When a gust of wind blows, I dance, not only me, but also the whole Phalaenopsis.

Ding! Ding! I didn't come to my senses until after class. I'm not Phalaenopsis, just watching Phalaenopsis.

I like Phalaenopsis very much.

Today, the teacher brought a pot of plant friends-Phalaenopsis.

Seen from a distance, this pot of Phalaenopsis is like a butterfly dancing on the grass, very beautiful.

The leaves of Phalaenopsis are light green. Put it under the lamp, its leaves are all green and shiny. The leaves feel smooth and thick with dark green stripes.

Phalaenopsis stems are green and thin, like sticks.

The flowers of Phalaenopsis are pink, as beautiful as a pink butterfly. Some flowers of Phalaenopsis have only two or three petals, and some have all opened, revealing a bright yellow stamen; There is also a flower bone bud, which looks full and will burst.

A breeze blew and I smelled a fragrance. At this time, I felt as if I were in a fairy tale world, and a group of butterflies flew towards me and danced around me.

What a beautiful Phalaenopsis! I like Phalaenopsis!

I really hope to become a beautiful butterfly princess and fly freely in the blue sky. Looking at the scenery and the cool breeze blowing on my face, I will feel that this is the happiest day.

These butterflies are very beautiful, and some are just like fairies dancing in the air, which is intoxicating; Some are like a yellow leaf, resting on the trunk; Some are like Zhang Fei's face in Beijing opera, which makes people laugh. Among so many butterflies, what impressed me the most was the natural, simple and beautiful "Brazilian butterfly". It is so bright that people fall in love at first sight. Most Brazilian butterflies are blue, but in that pure color, there is still a faint blue light, which is really amazing.

Butterflies are mostly small, delicate and lovely. But there is a kind of butterfly that is very big and beautiful. It is the "monarch butterfly". "Monarch butterfly" has many imposing names, which not only sounds good, but also looks unique: beautiful patterns are all over the body, with gorgeous colors, very beautiful.

At this moment, a child suddenly cried, "Butterfly, butterfly, what a beautiful butterfly!" " "We looked in the direction he pointed. Wow! Really! A very big butterfly. It has a blue bottom, yellow edges, red stripes and black spots. Everyone crept close to the butterfly, and the posture was almost the same as when the Japanese entered the village. But the butterfly suddenly flew, and everyone chased, shouted and scrambled. It's a pity that we "tiger generals" were turned around by a butterfly.

Butterfly, with beautiful wings and eternal expectation, has become a mummy butterfly, solidified with eternal beauty, just like a meteor, just like the moment when the meteor crossed the sky. Cold eternity.

Butterfly Description 10 The National Day holiday arrived, and my mother took my brother and me to the butterfly exhibition hall to see butterflies. When I arrived at the butterfly exhibition hall, I saw all kinds of butterflies as soon as I entered the door. Up to now, there are more than 14,000 kinds of butterflies in the world, some of which are graceful and colorful, like a beautiful and lovely little girl, and then they dance heartily. Butterflies, their colorful bodies are intoxicating!

Most of the butterfly exhibition halls are world-famous butterflies. Some butterflies are alive, others are made into specimens, and their posture is eye-catching. Butterflies come from pupae. When pupae leave their nests, they will become beautiful and lovely butterflies. Some butterflies rest on the treetops and then fly again every once in a while. Some butterflies like to intercept passing butterflies and fly together, while others fly back and forth along their familiar routes. Among them, two butterflies are the most beautiful, that is, "Happy Butterfly" and "Bright Butterfly". The "Happy Butterfly Goddess" is not only graceful, but also proudly spreads its wings like a peacock, and its wings will glow and change color. The shape and color of "Goddess of Light Butterfly" are unparalleled and impeccable. Butterfly's wings open and close for a while. Open like an umbrella and close like a leaf. Butterflies usually have four to six feet. The butterfly grabs the branch with its feet and plays on it to its heart's content. There are also some butterflies to contact with other partners. They are protected by the group and are not afraid of being bullied by other butterflies. Really help each other!

Butterflies have various shapes, and each butterfly has different characteristics, habits and lifestyles. Their butterfly wings have beautiful patterns. Later, I thought to myself, "Are butterfly wings used to keep balance?" Then, I gently touched the butterfly with my hand. The butterfly danced and its wings flew to the green shoots in balance. Later, it was found that butterfly wings should be used to keep balance, and the answer to this question was found. I jumped three feet with excitement. I saw an aunt shouting, "Please visit the back. Later, we followed the crowd to the back. Walking into a shed, there are all kinds of butterflies flying inside, which is more full of my curiosity. We rushed forward, and an aunt wanted to let the butterfly out. We are very nervous. We watched my aunt fly a lot of butterflies and found that many butterflies flew out of the bag.

Butterflies are everywhere here. This seems to be a wonderful world. How beautiful! Butterflies symbolize beauty, happiness, auspiciousness and friendship.

Butterfly Description 1 1 (1) Butterflies like to fly around, sometimes "chasing catkins" and sometimes "dancing into pear blossoms", but wherever they are, they keep rolling and never want to fly along the gentle path again. This ingenious dance step of butterflies has inspired poets and painters for a long time, but it has also aroused people's doubts: since butterflies have such huge wings (relative to them), they should be able to easily coordinate their flight postures, why do they choose such a tortuous and bumpy flight mode?

(2) In fact, this is an evolutionary strategy for butterflies to fight predators, because the weirder the flight path, the harder it is for hunters to catch butterflies. Compared with birds with strong wings designed to make full use of aerodynamics, butterflies are not very professional pilots. What they pursue is not the speed and height of flying, but the agility to change direction. Moreover, the benefits of butterflies "flying around" not only interfere with the hunter's prediction, but also make it difficult for hunters to get close. Scientists at China Experimental University in Tieling, Kyoto, Japan have made a hydrodynamic simulation of the flying pattern of butterflies. The results show that the butterfly is accompanied by many ups and downs, which can produce turbulent gas turbulence around it and interfere with the hunter's attack route. Therefore, poisonous butterflies tend to fly more smoothly than non-toxic butterflies, because they are more reluctant to adopt this escape strategy.

(3) How is this difficult "flying around" achieved? In order to find out this problem, scientists from Cornell University in the United States studied the physical characteristics of butterflies. It has long been known that the front wings of butterflies are connected with muscles, and the rear wings are only passively driven by the front wings, which seems to have no effect. Scientists try to study the function of butterflies by gradually narrowing their hind wings. They found that even if all the hind wings are removed, the butterfly can still fly continuously, and the flight path can still be tortuous as usual, but the speed of flying and turning is much slower. Obviously, the butterfly's hind wings are not used to provide flight lift, but are specially used to enhance the flexibility of the body when turning.

(4) Scientists from Johns Hopkins University have done similar research. They estimate the weight of each part of the butterfly's body through anatomy, and then record the butterfly's flight movement through high-speed cameras. It is found that besides wings, the butterfly's body also plays a very important role in flight. Butterflies can adjust their center of gravity by changing the relative position of their bodies and wings, and enhance their mobility (such as turning around), just as skaters or divers can change the spatial distribution of their body gravity by swinging their arms and legs, thus making graceful movements. Monarch butterflies are especially good at this. They can make a 90-degree turn in a shorter distance than their own length.

(5) However, butterflies still have a puzzling problem. Most of them are brightly colored, which is more likely to attract the attention of hunters, which seems to violate the evolutionary strategy of butterflies. Now scientists have found that the gorgeous appearance of butterflies reflects their biological wisdom. Butterflies originally evolved from moths that like to move at night. They took the lead in developing big wings and avoidance skills against bats. Butterflies only move during the day, and they have huge wings, which are easy for birds to see anyway, so they simply evolve their bodies into conspicuous colors as a kind of propaganda-butterflies are very difficult to catch. If a young bird with no hunting experience sees a bright butterfly, it will think, "Wow, look at this fat one, it's mine." But soon the bird found that butterflies were not only difficult to catch, but also very slippery even if they were caught, because their wings were covered with scales and it was easy to escape. Over time, birds will realize that catching butterflies is too laborious, and gradually lose interest in butterflies and turn to other prey.

(6) Therefore, with its unique biological wisdom, butterflies not only protect themselves, but also leave a beautiful scenery in nature.

20. How to understand the function of paragraphs (1) in selected texts? (3 points)

Paragraph (1) explains the characteristics of butterfly flight in vivid language (1); Naturally, it leads to the following explanations: the flight strategy of butterflies (or the reason why butterflies "fly around") (1); Ask questions at the end to arouse readers' reading interest and thinking (1 point).

2 1. Summarize the contents of paragraphs (2)-(5) of the selected text in concise language. (3 points) Biological wisdom of butterflies (or: colorful reasons for butterflies flying around).

22. How does the addition of the word "seems" in paragraph (3) of the selected text reflect the language characteristics of the explanatory text? (3 points)

"As if" means "as if", indicating speculation and playing a role of modification and restriction (1); It shows that people's understanding that "the butterfly's hind wings don't work on its flight mode" is only a guess, not sure, and has not been scientifically proved (1); The word "seems" embodies the characteristics of accurate and rigorous interpretation language (1 minute).

23. What are the two ways to explain the underlined sentences in paragraph (4) of the selected text? What's the role? (3 points)

Examples and column numbers (2 points). Specifically and accurately, the butterfly can adjust its center by changing the corresponding positions of its body and wings, and complete a flexible turn (1).

24. Choose a (b) that is inconsistent with the selected text (3 points).

A. The rapid gas turbulence generated by the butterfly's "flight" can interfere with the hunter's attack route.

B. Butterflies pursue not only the speed and height of flight, but also the ability to change direction quickly.

C. The butterfly's hind wings can enhance the flexibility of the body when turning, thus helping the butterfly to speed up its flight and turn.

D. Butterflies use their bright colors to convey a message to the captors: Butterflies are very difficult to catch.

The birth of plastic bags has brought a lot of convenience to our life, but it is also endangering our environment.

People buy things with plastic bags, buy food without baskets, and throw them everywhere when they are used up. As soon as the wind blows, these white "butterflies" begin to fly in the air and then fall to rivers, lakes and the earth.

Maybe people think it's nothing, and it disappears after a long time. However, most of these plastic bags are non-degradable plastic bags. Even after decades and hundreds of years, these white "butterflies" will not disappear, because they will not decompose, but will always exist.

Think about it. After decades and hundreds of years, the earth will be full of white "butterflies". Some people think that since burying in soil is not feasible, it should be burned, but burning plastic bags will produce a toxic gas, which is harmful to our health. Moreover, these toxic gases are getting together more and more, covering the blue sky. Can we still see birds flying happily in the sky and stars shining happily?

One night, my mother and I went for a walk. When we were tired, we stopped at a pavilion in the park. There are some grandfathers and grandmothers sitting in the pavilion.

At this time, an old man said, "Now the water in this river is full of plastic bags and plastic lunch boxes, which is really disappointing." There used to be so many plastic bags in the river that you could drink them directly! ""Yes, yes, how serious the' white pollution' is now. "The grandmother on the side also said." White pollution "! Isn't this what the teacher said about serious environmental pollution? I thought about it in my mind and asked, "Grandpa, is the' white pollution' here very serious? "Grandpa listened to my words and turned to me and said," Yes, you go to the river. All white plastic! " "I will go to the river suspiciously. Oh, my God, how did this happen? There is a lot of rubbish floating on the water. At first glance, plastic bags account for the majority.

When I got home, I checked the information on the Internet, only to find that Grandpa was right, and the white pollution in Jiande was already very serious.

Therefore, we can only use less plastic bags. Now when we go to the supermarket to buy things, plastic bags are no longer free, but cost ten cents or twenty cents, so some people think that you don't have to spend money to buy a plastic bag as long as you hold these things in your hand. In the vegetable market, what we see is no longer white plastic bags, but baskets or cloth bags.

However, many people choose "white pollution"-non-degradable plastic bags. If everyone can consciously realize the seriousness of "white pollution", we don't have to worry about plastic bags. Manufacturers want plastic bags to bring convenience to people's lives, but now they are called the worst invention of the twentieth century!

Jiande was originally a beautiful tourist attraction, but "white pollution" is increasingly endangering our beautiful environment and ecology. Let's start with me, use less plastic bags, prevent white "butterflies" from flying, prevent white pollution, and build our beautiful Jiande and ecological Jiande.

Butterfly Description 13 Her name is Pei Xin, and she is a first-year student. Every teacher and classmate can't help but say, "You are as beautiful as your name!" " Pei Xin doesn't think so. She believes that the beauty of the soul is the real beauty. She always wears that purple dress with several purple butterflies on it. Pershing likes purple butterflies. She said that she probably belongs to the butterfly, and the butterfly is her protector.

When studying in the morning, Pei Xin's good friend Fan Yuyu handed her a note. Pei Xin took the note, motioned not to pass it on, and began to read. I saw the author: Pei Xin, I have a message for you. (3) Li Shu in class says you are the beauty queen, and Qin Hao in our class likes you! Seeing this, Pershing was so angry that she struck the table. She handed Fan Yuyu a piece of paper and asked her to accompany Pei Xin to Class 3 to find Li Shu after class.

The class was over, and the two of them walked out of the classroom. "Ha ha, Mrs. Qin is here!" "A warm welcome!" Before Pei Xin and Fan Yuyu walked into the classroom, Class 3 was already a sensation. "What to say! Be careful that I let my brother hit you! " Fan Yuyu nasty, roared.

"Who is it?" Li Shu walked into the classroom.

You! Pei Xin cried!

What happened afterwards?

Butterfly explanation 14 Everyone's life is in his own hands, because in his life, he will inevitably encounter setbacks, failures and blows. But as long as I stick to my goal and don't give up easily, then we will definitely overcome it.

One day, after the rain cleared, the ground was still wet. I play in the park with my friends. I found a lot of people around me, so I wanted to join in the fun and take a closer look. It turned out to be a butterfly with wet wings and trapped in a puddle. It struggled desperately to take off again, but no matter how hard it tried, it didn't help. Out of curiosity, I decided to stay there and continue to observe.

After a while, its persistence seems to have some signs of success. I have been cheering for butterflies in my heart: Come on! Come on! It is about to fly out ... at this moment, my friend came running curiously. Because of impatience, she stepped into the stagnant water on the road, and the water splashed on the butterfly, which was already difficult to struggle, which made it worse. However, it did not give up life, but continued to work hard. Ten minutes, twenty minutes, an hour ... It finally flew. I watched it wake up and dance happily on the leaves ... Maybe it was too excited. It stopped for a while and then couldn't wait to fly to the blue sky and white clouds. ...

Look!-Butterfly! What a tenacious vitality! Like butterflies, we will never give up easily when we encounter difficulties. Success belongs to the persevering.

On this morning after the rain, an ordinary butterfly told me this truth: "If you are strong enough, you are unprecedented"-Scott Fitzgerald.

Butterfly Description 15 I am a beautiful butterfly. I collect pollen every day, and my life is ordinary but happy.

One day, on my way to collect pollen, I was suddenly stuck by something. A closer look reveals that it is spider silk. I began to look around and saw spiders not far away. I was frightened. I tried to get rid of it by brute force, but it was useless. Instead, let the spider who is spinning silk feel the power. My cousin's familiar spider turned around and suddenly changed his face. He is so happy! Every step it takes, my heart beats faster, and I'm almost desperate, but I think if I die like this, it's meaningless. Suddenly, my eyes lit up, I easily bit off the spider silk with my mouth and attacked with my hand. The spider got angry and spun silk on my side. I quickly broke the others with my hands. At this critical moment, I cut the thread around me and fell, but I immediately flew again and escaped from the spider's clutches.

When I came back from collecting pollen, my parents asked me, "Why did you come back so late?" I said, "I escaped the spider's bondage with my wit and courage." "You are a clever boy."

When you encounter difficulties in the future, you should be calm, be good at thinking and dare to do it. In fact, you may die, which is better than 100% death.