当然，在服务中，我们的目标是帮助顾客，减少对打印纸张的需求。

And of course in services, what we're trying to do is help our customers have less need for printed pages.

youdao

通过调用print，您触发了一个机制，该机制在一个单独的线程中向打印服务发送内容。

By calling print you trigger the mechanism to send your content to the print service in a separate thread.

youdao

在样例服务实现中，我们要确保，每个函数所需的执行时间最少是一秒，而且在执行的同时打印出一些消息。

In the sample service implementation, we make sure that, each function's execution time requires at least one second and it will print out some message while being executed.

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