Second, module testing eases the task of debugging (the process of pinpointing and correcting a discovered error), since, when an error is found, it is known to exist in a particular module.

• 第二，模块测试使调试（查明和更正发现错误的过程）的工作变的轻松，当错误被发现时，它已知的定位在一个特有的模块上。