但是由于氟利昂和哈龙的出现，使臭氧层受到很大的破坏。

However, due to the emergence of CFCs and halons so great damage to the ozone layer.

youdao

但是由于氟利昂和哈龙的出现，使臭氧层受到很大的破坏。

However, due to the emergence of CFCs and halons so great damage to the ozone layer.

youdao