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I first heard about the ozone layer about twenty years ago. I was still in school. I thought it was interesting, but I didnt take it seriously. It was a bit like science fiction, I mean, how could there be a giant hole in the atmosphere? Over the yea

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as it is 事实上，实际上 be running out of 用尽，用完 beneath 在之下 capsule 容器 cause ...to 导致 （使处于的结果 ） collapse 坍塌 drill 钻孔 explosive 炸药 keep in touch with 与保持联系 layer 层 lose heart 失望，

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Can we help the environment by being green? We all know that humans are damaging the environment, but what can we do about it? Some people are trying to do their bit to try to be more environmentally friendly . Local councils in Britain encourage ce

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It's a common enough sound in summer, after the wind finally picks up on a hot and humid afternoon, as the rain starts spattering down in big, fat drops--you're in for a full-blown thunderstorm. It's much less common in winter, even during a snow sto