解析函数是复变函数论主要的研究对象，而解析函数的五个等价条件又贯穿了我们对复变函数论学习的全过程。
Analytic functions of complex variable function is the main object of study, and the five equivalent conditions of analytic functions penetrate the whole process of learning of complex function.
静态关键字将仅仅尝试在当前类中解析调用，而不是在定义函数的类中执行。
The static keyword will simply try to resolve the call in the current class instead of the class the function was defined in.
我们将考察使用这些函数解析和检查输入而不进行手动编码的原因，并介绍一些如何使用这些新函数的基本示例。
We will look at reasons for why you would use these functions for parsing and checking input, instead of hand-coding, and we cover some basic examples of how to use these new functions.
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