臭氧是地球防止紫外线辐射的屏障。
Ozone is the earth's barrier against ultra-violet radiation.
当天气炎热时，鸵鸟会把它们背在背上，这样就增加了太阳辐射与皮肤之间的屏障厚度。
When conditions are hot, the ostrich erects them on its back, thus increasing the thickness of the barrier between solar radiation and the skin.
对于那些必须长时间与电脑打交道的人来说，喝茶可以帮助他们建立一道抵御电脑辐射的屏障。
To those who have to work with computers for a long time, drinking tea can help them to build up a wall against the computer radiation.
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