Registers an extender provider for a specific extender category .

为特定的扩展程序类别注册扩展程序提供程序。

The concept of a cellphone extender isn 't new , but not many of them have caught on .

让手机与电话相连并不是什么新鲜事，不过吸引人的产品并不多。

The extender instance is no longer valid .

扩展程序实例不再有效。

The extender provider failed to return an extender for this object .

扩展程序提供程序未能为该对象返回扩展程序。

The extender instance could not be created successfully or was destroyed .

扩展程序实例未能成功创建或已被销毁。