您要能够为您的服务确定运行级别：应答时间、启动时间，当前用户的平均数量等等。
You need to be able to define operational levels for your services: response time, up time, average number of concurrent users, and so on.
即使您不知道这个服务器要花费多长时间来应答，但是您可以让用户明白这个任务正在运行而且需要等待一段时间。
Even though you don't know how long it will take the server to respond, you can let the user know that the task is running and that the user should wait.
即使您不知道这个服务器要花费多长时间来应答，但是您可以让用户明白这个任务正在运行而且需要等待一段时间。
Even though you don't know how long it will take the server to respond, you can let the user know that the task is running and that the user should wait.
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