What are the parallelism sentences?

The parallelism sentence is as follows:

1. Trees are the guardians and silent friends of mankind. Trees are biological oxygen generators, and a big tree can produce 70 kilograms of oxygen a day; Trees are nurses of the soil, preventing desert and sandstorm attacks; Trees are also natural reservoirs, providing rain and dew for the earth.

2. Trees are the environmental guardians of the earth. Trees are our friends. Trees bring us a healthy life and a beautiful environment.

3. Trees are effective gas masks for human beings; Trees are factories that make air; Trees are machines that purify the air.

Trees are our good friends. Trees can block out the sun. Trees can keep out rain, and trees can make the air fresher.

The trees all over the mountains are like endless green scrolls, like natural barriers, like soldiers waiting for battle on the border.

6. trees! Without you, we will lose our lives! Without you, we won't see the beauty of green! Without you, we will lose many lives! Without you, the summer sun can't cover it! Without you, our ancestors would not have found fire!

7. The leaves of various trees in the forest have different shapes. Some are like a huge palm; Some are like a dancing butterfly; The others are like a lifelike banana fan.

8. The waves of the sea are like a poet's pen and ink, depicting ever-changing beauty; The tide is like the melody of a band, playing passion and harmony; The color of the sea is like a painter's palette, showing endless blue and green.

9. Trees are our books; This is our wooden table; It is the pencil we use; It is the source of our most commonly used items. It gives us all energy selflessly, including its body.

10, the sea is like a girl with thousands of faces, showing an ever-changing face; The sea is like a silent poem, telling endless stories; The sea is like an eternal warrior, guarding endless secrets.

1 1. The sea is a blue treasure with endless mystery and surprise; The sea is the cradle of life, pregnant with the hopes and dreams of countless lives; The sea is a symphony of nature, playing eternal melody and harmony.

12, the blue of the sea is deep and mysterious, like a commitment to the world; The waves of the sea are white and light, like angel's tears; The bottom of the sea is dark and rich, just like the secret of the earth.

13, the sea is a harbor of wind, a stage of rain and a hotbed of thunder; The ocean is the hometown of life, the cradle of culture and the spiritual sustenance. The sea is the source of dreams, the cornerstone of courage and the beacon of wisdom.

14, the waves of the sea hit the coast, like the torrent of history washing away the traces of time; Tides stir the soul, such as the rhythm of life awakens the desire for dreams; The blue waves of the sea are rippling in the sky, just like eternal poetry telling beautiful stories.

15, the vastness of the sea is like an infinite vision for the future; The depth and vastness of the sea is like the endless pursuit of truth; The majestic power of the sea is like the firm courage to challenge.