In this use case, the system interface component is the implementation of such as contract.
在此用例中，系统接口组件是契约之类内容的实现。
An interface is like a contract.
接口与合同类似。
How to find Contract ID by interface name?
如何通过接口名称找到合同编号？
Your contract interface can also inherit this class.
您的合约介面也可以继承这个类别。
Your contract interface can also inherit this class.
您的合约介面也可以继承这个类别。
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