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Anonymous users2024-02-06Butterfly. The colors of the colorful butterflies are very natural, such as the heavy moon butterfly, the brown vein golden spotted butterfly, etc., especially the fluorescent winged butterfly, which is sometimes golden in the sun, sometimes emerald green, and sometimes from purple to blue. Scientists have been able to study the colors of butterflies for military defense.
During World War II, the Germans surrounded Leningrad in an attempt to destroy its military targets and other defenses with bombers. Based on the lack of understanding of camouflage at that time, the Soviet entomologist Schwanvich proposed to cover military facilities with butterfly-like camouflage by using the color of butterflies that are not easy to be found in flowers. Thus, despite the efforts of the Germans, the military base in Leningrad remained unharmed, laying a solid foundation for winning the final victory.
According to the same principle, later people also produced camouflage uniforms, which significantly reduced the number of ** in battle.
Due to the continuous change of position of artificial satellites in space, the temperature can change suddenly, and sometimes the temperature difference can be as high as two or three, which seriously affects the normal operation of many instruments. Inspired by the fact that the scales on the butterfly's body will automatically change the angle and adjust the body temperature with the direction of sunlight, the scientists made the temperature control system of the artificial satellite into a shutter style with a large difference in the radiation of the blades and a large difference in heat dissipation capacity, and a temperature-sensitive metal wire is installed in the rotating position of each window, and the opening and closing of the window can be adjusted with the change of temperature, so as to maintain the constant temperature inside the artificial satellite and solve a major problem in the aerospace industry. One edition is to protect nature, for example:
Protect water resources and protect the ...... of the ozone layer
The first edition is the current environmental problems, such as the hole in the ozone layer, water scarcity ......The first edition is the beautiful scenery of nature, picturesque scenery, write about some famous attractions, and by the way, praise the magnificent rivers and mountains of the motherland.
The surrounding area is painted with towering trees and clear streams ......
If the level of painting is not good, paint some blue sky and white clouds.
Compasses and rulers can be used.
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Anonymous users2024-02-05Step into nature and copy the newspaper by hand.
Hand-copied newspapers about nature, hand-copied newspapers of nature.
The hand-copied newspaper about nature is simple and good-looking, and a selection of 8 photos.
Magical nature hand-copied newspapers.
Nature's Understanding of Hand-Copied Newspapers Large Numbers or Nature's Hand-Copied Newspapers.
Elementary school students protect nature and copy the natural beauty of the newspaper by hand.
Nature's hand-copied newspaper.
The hand-copied newspaper about nature is simple and good-looking, and a selection of 8 photos.
The relationship between the protection of nature and nature.
How to draw a hand-copied newspaper by nature.
Nature's hand-copied newspaper ** excellent.
2020 Nature Handwritten Newspaper 2020 Nature Handwritten Newspaper Simple Content.
The hand-copied newspaper for the protection of nature is simple, loves the nature electronic tabloid, and the nature hand-copied newspaper ** Daquan enters.
Hand-copied newspaper of nature's onomatopoeia, hand-copied newspaper of nature.
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Hand-copied newspaper about natural scenery, hand-copied newspaper of nature.
A beautiful handwritten newspaper about nature for the fourth grade, a handwritten newspaper of nature.
I love nature's hand-copied newspapers.
Nature's hand-copied newspaper.
In spring, I love nature's hand-copied newspaper, I love nature, and hand-copied newspaper Bi Qin.
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Anonymous users2024-02-04Beautiful sentences that describe nature.
1. Feel the gift of nature....A natural and pollution-free picnic. Sometimes it really takes courage to walk in style.
2、.Enjoy the breeze of nature and get a good night's sleep.
3. The changes of the four seasons also need to go to nature to feel, in the city there are only fans and air conditioners, only cotton clothes and coats. But if you go to nature, you can know the changes of some animals and plants in the four seasons, and they are also trying to survive!
4. Surrounded by green eyes, she stood in the woods bathing in the temperature of light. It's as if all the good things are there.
At this moment, enjoy nature to the fullest!
5. How long have you not traveled? Do you want to find a time to relax and enjoy the wonderful changes of nature outside the window to the rhythm of the train, away from the hustle and bustle of the city?
6. May the years be good, enjoy the gifts of nature, and cherish the days and ...... like water
7. May flowers are blooming, I want to enjoy this most beautiful Dawei Mountain with you! May is a magical season, and in an instant, the azaleas are in full bloom, and this is the time to enjoy the scenery and relax with your friends! Enjoy the joy that nature brings us
8. In nature, to enjoy this rare leisure time, sometimes what we need to do is just relax.
9. Surrounded by the greenery of her eyes, she stood in the woods bathing in the temperature of the light. It's as if all the good things are staying in this moment, enjoying nature to the fullest, right?
30. Go to nature, feel the change of the four seasons, feel the temperature, touch the grass, see the grass sprouting in spring, the fallen leaves in autumn, and the withered yellow in winter, which is a very charming thing in itself.
31. Nature is very big, as long as you observe and perceive with your heart, every scene around you is nature, and nature will never be found, as long as you maintain a sincere heart of exploration, nature will be everywhere.
32. The afterglow of the sunset, the breeze blows, the water surface is sparkling, the beauty of nature cannot be described in words, the end of the day, enjoy the passage of time quietly, good night, good dreams?
33. Appreciating the beauty of nature, praising nature, and returning to nature, making people feel relaxed, and taking in the scenery in their eyes. While appreciating the beauty of nature, people feel the wonderful beauty of nature, and find the feeling of the integration of heaven and earth.
20. Get close to the water of White Horse Lake, embrace the sea of flowers, walk with happiness, and fully enjoy the relaxation and comfort brought by nature.
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