The pollution caused by the CFCs and other stratospheric
由氯氟烃等造成的平流层污染
can cause the decrease of ozone concentration in the Earth's protective ozone layer ,
可引起地球臭氧保护层内臭氧浓度下降,
甚至使臭氧层破坏.
and even destory the ozone layer.
这句话真不好弄.
知识在于点滴积累,更在于不懈努力.
——另外,正在冲正确率,请记得采纳,