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下去，他們的發現能爲全世界可能發生的情況提供線索。