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。