ozone

1. N-UNCOUNT Ozone is a colourless gas which is a form of oxygen. There is a layer of ozone high above the Earth's surface, that protects us from harmful radiation from the sun. 臭氧

What they find could provide clues to what might happen worldwide if ozone depletion continues. 如果臭氧的損耗繼續(xù)下去，他們的發(fā)現(xiàn)能爲全世界可能發(fā)生的情況提供線索。