这些操作符只为带有一个或多个虚函数的类返回动态类型信息，对于其他类型，返回静态（即编译时）类型的信息。

These operators return dynamic type information only for classes with one or more virtual functions. For all other types, information for the static (i. e. , compile-time) type is returned.

youdao

更多信息所带来的好处就是，可以更早地捕捉到某些类型的错误，而动态类型语言只有到运行时才能检测到这些错误。

One of the benefits of the additional information is the ability to catch certain kinds of errors that a dynamically typed language won't detect until run time.

youdao

毕竟，开始的时候可能觉得在一个动态语言中加入更多类型信息是多余的。

Initially, it may feel odd to add even more typing information to a dynamic language, after all.

youdao