The compiler understands the conditional attribute, so it can do a better job of verifying code when conditional attributes are applied.

编译器可以识别Conditional属性，当条件属性被应用时，编译器可以很好的完成工作。

youdao

The compiler understands the conditional attribute, so it can do a better job of verifying code when conditional attributes are applied.

编译器可以识别Conditional属性，当条件属性被应用时，编译器可以很好的完成工作。

youdao