若有非法的参数传入，加以检查，则会立刻引发意义明确的异常。相反，若无此检查，后续情形大相径庭。

If an invalid parameter is passed into a method with checking, a prompt and clear exception will be thrown, the situation can be quite different without a check.

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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.

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拥有参数的方法不是类终结者(实际上，一个规则应当将这些报告为非法的)。

Methods with parameters are not class finalizers (in fact, a rule should be written to report these as invalid).

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