It is only now, as we approach the crisis, that scientists start to worry, and deep fears arise that if over a billion Chinese all start to use cars and refrigerators it will be hard to protect the ozone layer.
如今危機逼進，某些科學家憂心忡忡，深怕當十億中國人都有冰箱用、有汽車開的時候，地球的臭氧層就難保了。