Some service programs simply run a program in the background and then they themselves exit (in other words, the service program finishes, but the real work is still happening in the background).

一些服务程序仅仅是在后台运行一个程序，它们自己就退出了(也就是说，服务程序结束了，但是真实的工作仍然在后台进行)。

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When using the service model, on the other hand, you program against services and contracts, and timeouts are more in the background.

另一方面，使用服务模型时，您针对服务与合约撰写程序，逾时比较是在背景部分。

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