介绍了有效最低公共祖先（FLCA）的概念，在此基础上提出紧致的有效最低公共祖先（CFLCA）的概念。

The concept of eFficient Lowest Common Ancestor (FlCA) was introduced, and then the concept of Compact eFficient Lowest Common Ancestor (CFLCA) was proposed on basis of FLCA.

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与字段调用一样，前两个变量返回可以通过类接入的公共方法的信息——即使它们来自于祖先类。

As with the field calls, the first two variants return information for public methods that can be accessed through the class — even those inherited from an ancestor class.

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