For example, types substituted for the type parameter can be constrained to inherit from a particular type, to implement a specific interface, to provide a parameterless constructor, and so on.

• 例如,替代类型参数的类型可以被约束为从特定类型继承、实现特定接口、提供无参数的构造函数等等。请参见:泛型、泛型类型参数。