You could fall back on type checking inside the add method, but that is not elegant and inflexible.

您可以依赖add方法内部的类型检查，但这并不优雅而且不固定。

youdao

You could fall back on type checking inside the add method, but that is not elegant and inflexible.

您可以依赖add方法内部的类型检查，但这并不优雅而且不固定。

youdao