Figure 1 shows a class diagram of the Email object and the Sendable interface.

图1显示了Email对象和Sendable接口的类图。

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Using fundamental object-oriented design principles, the architecture team may decide to update the Sendable interface to extend the vendor's Validatable interface.

运用基本的面向对象设计原理，体系结构团队决定修改Sendable接口来扩展供应商的Validatable接口。

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The architecture team worked hard to abstract the communication implementations with the Sendable interface; however, the team's first attempt seemingly ignored this interface.

体系结构团队想方设法使用Sendable接口来抽象通讯实现；然而，他们的第一次尝试就好像忽略了这个接口。

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