如果没有进行静态检查，那么这类错误到了运行的时候才会被捕获。
Without static checking, such errors are not caught until run time.
最主要的原因是，我可以委托在一个地方的错误处理：在我的主要职能，在我所有的异常都会被捕获。
The main reason is that I can delegate the error handling in one single place: in my main function, where all my exceptions will be caught.
最主要的原因是，我可以委托在一个地方的错误处理：在我的主要职能，在我所有的异常都会被捕获。
The main reason is that I can delegate the error handling in one single place: in my main function, where all my exceptions will be caught.
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