Each service can only serve a certain type of request.

每个服务只能服务某种请求类型。

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That combination can then serve as a service itself.

接着，这种组合可以作为服务本身来服务其他组件。

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You can combine this with the HTTP implementation to provide a lightweight service to serve up the contents of a file, updating the data returned as the file content is modified.

可以通过结合使用计时器和HTTP实现提供轻量的服务，从而自动地提供文件内容，在修改文件内容时更新返回的数据。

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Military service is voluntary, and less than one percent of Americans serve.

VOA: special.2011.07.08

They serve like their service members with pride, and they do it without complaint and they do it without regret.

WHITEHOUSE: First Lady Michelle Obama and Dr. Jill Biden Address National Governors Association | The White House

Today we serve 1, 600 service providers in about 50, 000 enterprises all over the world.

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Grant me courage to serve others for in service there is true life.

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