Common interface for entities that have type variables.

有类型变量的实体的通用接口.

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For those operations that are defined by the containers the library imposes a common interface.

标准库为由容器类型定义的操作强加了公共的接口.

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Deriving methods from the common abstract base class, Database , ensures conformance to a common interface.

派生于抽象类的方法, 确保了公共接口的一致性.

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