This allows the design of an application to focus on the component parts, and hand off messages to the communication layer for delivery.

这使得在设计应用的时候，可以只关注于组件部分，而把消息传递给通信层去递送。

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In this scenario, a dishonest delivery boy surreptitiously delivers new instructions for the office workers' manual that instruct personnel to hand over all the office's money when he requests it.

在这个场景中，一个不诚实的男孩暗中更改了条例，当他需要时就可以指示员工将办公室的钱移交出来。

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Content providers have the growing need for targeting the delivery of dynamic content to several different consumer mediums, ranging from Web browsers to hand-held mobile devices.

内容提供者还需要将动态内容定向给几个不同用户媒介（从 Web 浏览器到手持移动设备）。

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There is something about a cancelled stamp that even beats hand delivery.

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Hand washing by birth attendants before delivery reduces mortality rates by 19 percent.

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