有一个东西你是无法看到的，那就是地球周围的臭氧保护层。
One thing you can't ever see is the invisible protective ozone layer around the Earth.
地球上的变化最令人烦扰的方面之一，是人类活动所产生的化学污染正在迅速破坏地球上部大气圈臭氧保护层。
One of the most disturbing aspects of the changes in Earth is the rate at which chemical pollutants produced by human activity are destroying the protective layer of ozone in Earth's upper atmosphere.
Crutzen由于揭示了人造化学物质吞噬大气层中的臭氧保护层而分享了诺贝尔化学奖，他说这一“人类时期”是长是短尚不得而知。
Whether this "age of man" will be short or long is unknown, says Crutzen, who shared his Nobel for unmasking the man-made chemicals eating away at the atmosphere's protective ozone layer.
臭氧在距地球表面12至30英里的地方形成一个保护层。
Ozone forms a protective layer between 12 and 30 miles above the Earth's surface.
晒伤增多的一个原因可能是臭氧层空洞，而臭氧层是保护地球不受太阳紫外线危害的保护层。
One reason for the rise in sunburn could be the hole in the ozone layer - the protective layer that shields the Earth from the sun's harmful ultraviolet rays.
身为地球的保护层-臭氧层亦破了个大洞。
As a protective layer of the earth - the ozone layer also tore a large hole.
身为地球的保护层-臭氧层亦破了个大洞。
As a protective layer of the earth - the ozone layer also tore a large hole.
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