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英文故事及其读后感精选(7)

2022-08-12 来源:百合文库
All life on Earth would be no life left the sunlight and the sun light is visible light, ultraviolet, infrared, three parts. Sunlight into the atmosphere (including UV), 55% of light through the atmosphere to the earth and sea, of which 40% of visible light, which is the driving force for photosynthesis, green plants; 5% 100 — 400 nm wavelength ultraviolet light, and ultraviolet divided into long wave, medium wave, short wave ultraviolet light, UVA can sterilization.

英文故事及其读后感精选80条


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