众所周知，词汇是GRE考试的基础。那么怎样才能掌握GRE必备的词组呢？新东方小编在这里为大家总结一些常用的核心词组，希望对各位备考有帮助。

　　a case in point 绝佳例证

　　释义

　　If you say that something is a case in point, you mean that it is a good example of something you have just mentioned.

　　例句

　　In many cases political uncertainties are the cause of people fleeing their country. A case in point is post-Soviet Russia.

　　GRE

　　Researchers are finding that in many ways an individual bacterium is more analogous to a component cell of a multicellular organism than it is to a free-living, autonomous organism. Anabaena, a freshwater bacteria, is a case in point .

　　研究者们正在意识到，相比于一个独立的生命个体，细菌更接近于多细胞生物中的单个细胞。一种名为项圈藻的淡水细菌就是很好的例子。

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(编辑：马荟)