Explanatory article 300 words

In real life or work and study, we often see the figure of composition. Composition is a narrative method to express a theme through words. How to write a thoughtful and literary composition? The following are nine 300-word expository compositions I compiled for you, hoping to help you.

300 words 1 bridge is the connection between land and land. Bridge is the love between river and road. The bridge is a post road for ships and vehicles to nod. This bridge is where rowers wave goodbye to pedestrians. Humans who have suffered from trekking. Thanks to this bridge.

Bridges not only facilitate people to cross the river, but also make the scenery more beautiful and even develop into places of interest. Some bridges are surprisingly built, some have no piers at all, some are made entirely of marble, and some are even designed in an X shape. This must be incredible for those who invented the wooden bridge because of a brainwave at that time.

Every time I walk through the overpass, I can't help but want to stop and look at the passing vehicles and pedestrians, which makes me feel the rhythm of the rapid development of the city, and the face of the city is changing dramatically day by day. Especially at night, against the background of street lamps and advertising neon lights, cars with lights on under the bridge are like meteors passing by. Really beautiful!

In Shenzhen, in order to see the viaduct more clearly, I boarded the footbridge parallel to the viaduct on Shennan Road in Hengjia. Looking at the speeding train from the south, I was filled with emotion: the builders of the special zone built overpass after overpass on their own. I want to be proud of this railway bridge and the people of Shenzhen!

There are all kinds of bridges in the world, including Jin Ao Yudong Bridge, Jinshui Bridge and 17-hole Bridge ... and my favorite is the ordinary and solid Siping Bridge in my hometown.

The deck of Siping Bridge is made of cement, and so are the guardrails. This kind of bridge is so strong that people will not fall off when they walk on it. There are many cable-stayed pipes with huge slogans on both sides of the bridge, which provides convenience for pedestrians and vehicles. 3 10 national highway passes through Lingbao city, an important life passage, which can run through the east and west. Although he is ordinary during the day. At night, his light reflected on the water, beautiful, as if to shine for the city.

The surrounding environment of Siping Bridge is the rippling Jinshui Lake in the north and the beautiful ancient city in the west. To the east is a beautiful new area with many magnificent tall buildings. It's getting dark, and the cars coming and going are running on Siping Bridge, but the bridge doesn't ask for anything in return and silently contributes to the people. People walked around him, and he had no regrets.

Every time I see Siping Bridge in my hometown, I am proud of him, because he shines on our beautiful Lingbao City.

The 300-character three-lamp is a symbol of light and warmth, and it is an invention that can empower people. Without the lighting function of lamps, we can only fall into darkness every dark night and do nothing. Even if there is moonlight shining, we can only wait for the sun to rise the next day, waiting for the light brought by the sun. Think about it.

In addition to the role of lighting, I think lighting brings us color and happiness in life. In the evening, we went out to the noisy streets and squares. What we see is a world of colorful neon lights. The originally lifeless night, under the irradiation of a lamp, looks so vibrant and full of vitality, and the whole world becomes interesting because of the existence of the lamp. Under the action of the lamp, people can subconsciously, there is no difference between day and night, because at every moment of the day, we can do what we want.

The charm of light is really endless. Let's give thanks for this great invention.

Explanatory composition 300 words 4 Hi! Hello, everyone, I am a dolphin swimming freely in the sea. The sea has shaped my body and my life, provided me with abundant food, and let me grow in its embrace.

I am a general term for the cetacean dolphin family. Body length 1.2 to 4.2 meters, weight 23 to 225 kilograms; The beak is short, less than one tenth of the body length; The body is streamlined and slender, and the forehead gradually increases; There are more than 20 teeth on both sides of the upper and lower jaws; Only the first two cervical vertebrae healed, and 3 ~ 4 cervical vertebrae healed in some types. *** 10 belongs to 34 species, distributed in tropical coastal areas of Pacific Ocean, Indian Ocean and Atlantic Ocean, and lives in estuaries and even rivers. We mainly eat fish and squid. Pregnancy is 9 ~ 12 months, and each fetus is 1. We swim very fast, up to 40 kilometers per hour. Although we swim fast, there are no waves or eddies on the sea.

Let me tell you two secrets. Our brain is divided into two parts, one for work and the other for rest. Another secret is that killer whales are one of us.

We live in groups, ranging in number from a few to hundreds.

Forget it, don't say it, my friend is calling me, bye!

In the vast ocean, there is a small and medium-sized fish-Yin. The fish lines are slim and symmetrical. It is agile, good at swimming, lively, and has the habit of adsorbing on the abdomen or bottom of big sharks, turtles and whales. Therefore, people call it bottom fish.

The fish print is attached to the object. In the process of traveling around the world, did you meet the sea area rich in bait or its "owner"? Great sharks will eat some leftovers when hunting, and then quietly leave their "boat" for a good meal. Then, look for a new "ship" and move on.

Once the "boat" cannot be found, it will cling to nearby rocks and other fixed objects for a short rest. At this time, its slender tail, like seaweed, drifts with the tide to attract fish, and whenever there is a good opportunity, it will constantly attract new "ships". Fishing at sea not only saves energy, but also relies on the strength of large marine animals such as ships and sharks to avoid enemy attacks. What a beautiful thing to kill two birds with one stone!

Explanatory essay 300 words 6 students:

June 1st is an international children's day, a festival for students and a grand festival for children all over the world.

In order to protect the rights of children all over the world and oppose the abuse and poisoning of children by imperialist warmongers, the board of directors of the International Democratic Women's Federation held a meeting in Moscow, the capital of the Soviet Union, on June 1949, and decided to designate June 1 day as International Children's Day every year. In order to cultivate children's spirit of proletarian internationalism and strengthen friendship with children all over the world, 1 949,65438+in February, our government decided to change April 4th Children's Day stipulated in 193 1 to June1International Children's Day. Every June 1 day, various celebrations are held all over China. Our party has always regarded children as the future and hope of the country and the successors of the revolutionary cause. Under the leadership and care of the Party, the whole society has assumed the responsibility of protection and education, and generations of children have grown up in the bright sunshine of new China.

Students, work hard! Let us grow rapidly in the embrace of the motherland, in the sunshine and rain, add luster to the motherland and create a more brilliant future.

Some people like golden oranges, some people like big red apples, and some people like ... but unlike them, I prefer bananas with golden coats.

When I came home from school at noon the day before yesterday, I found a bunch of bananas on the table, crowded together, as if discussing something. I gently break off one and observe it carefully. It has a golden coat with some black spots on it. Let's get together and smell it. The faint fragrance makes people swallow their mouths. I carefully peeled off its coat. At this time, the banana looks like a little girl in a skirt. I took a bite, cool, soft, chewy and sweet, mixed with the previous fragrance, delicious.

Bananas have many functions. Can help digestion, can be eaten as a meal, and can also ... Ah, bananas have too many functions!

Speaking of interesting things about bananas, there are too many. I remember once, I came home with a newspaper and found a bunch of bananas on the windowsill. I can't wait to break off one, peel it off, bite off half, and put it in my mouth to taste slowly. At this time, my mother came out of the kitchen and asked, "What's your score on the paper?" With a banana in my mouth, I vaguely replied, "Mmm … delicious, mmm …" My mother sighed, "Alas, you greedy little cat. Forget it, I'll read the newspaper myself. "

Do you think bananas are delicious after reading my composition?

Superstition means that people blindly believe or worship things. Superstition in a narrow sense refers to people's thoughts and behaviors of believing in divination, geomantic omen, fortune telling and ghosts. Superstition can bring serious consequences.

Superstitious people are often fascinated by something or phenomenon and believe in it. For example, parents believe in ghosts and gods. When the child is ill, they don't take him to the doctor. On the contrary, they will burn a spell for the child to drink, believing that the child will be blessed by God and recover. The result is self-defeating, causing pain to children and even losing their lives.

Superstitious people often blindly turn things and statements of "belief" and "worship" into disdainful behaviors. For example, superstitious people think that they are possessed by ghosts and turn to the stick for help. They believe what the stick says. It was not until they paid a lot of money and spirit that they found themselves cheated. You can say that you lost your wife and your soldiers.

In theory, people may have superstitious ideas about everything.

Lack of certain knowledge is one of the reasons why people are superstitious. Superstition can be said to be endless, so we must get rid of the bad habit of superstition.

Explanatory article 300 words 9 "Chaozhou Xiangqiao is so romantic, 18 shuttle boats in 24 States, 24 floors and 24 stairs, and two Niu Yi only fly." Do you know what scenic spot this ballad depicts? Let me tell you, it is the famous Guangji Bridge in our hometown. It is one of the four ancient bridges in China.

The total length of Guangji Bridge is 5 18m, with 8 piers in the west and 10 pavilions. There are 128 wharf and 14 pavilion in the east, and 18 shuttle boats are connected by iron cables in the middle. There is a cow at Pier No.8 in the west and Pier No.0/2 in the east. The cow in the east was washed upstream by the flood, so someone sang a song: "Chaozhou Xiangqiao is so romantic. Eighteen shuttle boats are in twenty-four States, twenty-four sets are twenty-four, and two Niu Yi only fly."

Guangji Bridge not only has a strange shape, but also has a beautiful legend: After Han Yu came to Chaozhou as an official, he found that the Hanjiang River cut off people on both sides of the strait and wanted to build a bridge, so he invited Guangji monk and Han Xiangzi to build the bridge. Monks in Guangji were built from the west and Han Xiangzi from the east. When they reached the middle, the stones were used up. So, He Xiangu put 18 lotus leaf in the middle to form a wooden boat, * * * put the board connected with Cao Guojiu's trick board on the wooden boat, and Tie Guai Li untied the belt to tie the wooden boat, thus forming a pontoon bridge in the middle.

Guangji Bridge shows the wisdom and talent of working people and is a valuable historical and cultural heritage of our country.