Levels of pollution present in the atmosphere are increasing. 大气中的污染程度正在加深。 Analysis showed that traces of arsenic were present in the body. 分析显示,尸体中有微量砷。 n. 1. 2. You've got to forget the past and start living in the present. v. 1. The local MP will start the race and present the prizes. 当地议员将鸣枪开赛,并颁发奖品。 More @Wikipedia
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