但是我们现在缺乏实现该接口的资金。

However, there are currently no recourses available to realise this interface.

youdao

当然，这意味着需要更多的工作量以实现该接口。

Of course, this would mean extra work to implement the interface.

youdao

如果将扩展点看作接口，那么扩展就是实现该接口的类。

If you think of an extension point as an interface, you can think of an extension as a class that implements that interface.

youdao