此外，很重要得一点是，Purify只在运行测试的过程中对部分的程序进行错误的检验。

In addition, it's important to know that Purify only does error checking on parts of your program that run during testing.

youdao

一般情况下，DOM实现必须检验操作的正确性，并在应用程序传递错误参数或者执行非法操作时抛出异常。

Normally, a DOM implementation must verify the correctness of operations and throw an exception if an application passes the wrong parameters or performs an illegal operation.

youdao

数据库验证是捕获错误的最后机会，但是好的应用程序应该事先检验数据(数据库引擎的错误消息可不是易读的)。

Database validation is the last chance to catch errors, but a good application has already validated the data at that point (and error messages from the database engine are anything but readable).

youdao