It does not know what type t represents, but it can create a placeholder for that type to refer to the type that t must be.

它不知道T代表什么类型，但它可以为该类型创建一个占位符来指代t的类型。

youdao

This placeholder class should represent the instantiation of List by binding the template parameter t to the template parameter of X.

该占位符类可以通过将模板参数t与模板参数X绑定来实例化。

youdao

This placeholder class should represent the instantiation of List by binding the template parameter t to the template parameter of X.

该占位符类可以通过将模板参数t与模板参数X绑定来实例化。

youdao