Ozone is the earth's barrier against ultra-violetradiation.
臭氧是地球防止紫外线辐射的屏障。
《牛津词典》
2
We knew that, when we took away this blanket of ozone, wewould have more ultra-violetradiation.
我们已经知道，当我们除掉臭氧这块毯子后，紫外线辐射会增强。
3
An important thing is monitoring the size of the hole in the zone layer above Antarctica, since this is an indicator of global ultra-violetradiation levels.