What they find could provide clues to what might happen worldwide if ozone depletion continues.他们的发现可以揭示如果臭氧持续减少，世界范围内可能会出现什么情况。Man – made CFCs are the main cause of ozone depletion in the stratosphere.人造氯氟烃是臭氧层破坏的主因.Wit...
Increased consumption of water has led to rapid depletion of groundwater reserves.用水量的增加导致了地下水贮备迅速枯竭.What they find could provide clues to what might happen worldwide if ozone depletion continues.他们的发现可以揭示如果臭氧持续减少，世界范围内可...
Except for smoking and drinking, he is a thrifty man.除了抽烟、喝酒, 他是个生活节俭的人.Be thrifty and hardworking in whatever undertaking you are to start on.办任何事都要勤俭.Lei Feng, always thrifty, had saved this sum from his allowances.雷锋一...