这决定服务开始运行的时间，而持续时间设置决定服务启动之后运行的最长时间。
This determines when the services start running, whereas the duration setting determines the maximum time the service runs after it started.
第一次运行时测试持续时间为最初的24个小时。
此次，系统测试应用程序还是基本且较简单的，然而，为了找到缺陷，能够在特定压力级别和持续时间内运行。
During this time, the system test application was also basic and simpler; however, it was able to be run under a certain level of stress and duration in order to find defects.
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