GRE：核心词组之a,case,in,point|stagepointcase

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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。