Component Interface Inheritance 部件界面可以继承
multiple interface inheritance 多接口继承
As such, WSDL 1.1 did not even contain a mechanism allowing for interface inheritance.
同样地，WSDL 1.1甚至没有包含一种机制来提供接口继承。
That's what interface inheritance means; if you fulfill the contract of the more derived type then you are required to also fulfill the contract of the less derived type.
接口继承就是这样的；如果你要满足派生程度较高的类型的契约的话，你就必须要满足派生程度较低的类型。
Granted, multiple interface inheritance would allow us to construct a corresponding set of interfaces, but the classes implementing these interfaces couldn't follow the structure directly.
就算多重接口继承允许我们构造对应的接口集，但是实现这些接口的类不能直接遵循该结构。
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