Exceptions let us separate problem detection from problem resolution. The part of the program that detects a problem need not know how to deal with it.

通过异常我们能够将问题的检测和问题的解决分离，这样程序的问题检测部分可以不必了解如何处理问题。

youdao

Let us have separate retail banks (dull, safe utilities where people can save and pay bills) and hive off the investment bankers.

ECONOMIST: No demographic time bomb