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1.human beings 人类
例句:All human beings are much more intelligent than animals.
所有的人都比动物聪明得多。
2.fell out 争吵；闹翻
例句:The two of them never fell out.
他们俩从来没翻过脸。
3.a group of 一组；一群
例句:Suddenly the door opened and a group of children burst in.
门突然打开，闯进了一群孩子。
4.there is no reason 毫无道理；没有理由
例句:There is no reason why they cannot see off the Republican challenge.
他们没有理由在共和党的挑战中败北。
