操作系统可以使用户把精力集中在自己的任务或应用软件上，而不必把精力浪费在管理计算机的复杂事物上。

The operating system allows users to concentrate on their own tasks or applications rather than on the complexities of managing the computer.

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过程通知计算机操作员应用程序将要执行哪个任务，并且还显示一个时间戳。

Procedure tells the computer operator which task the application is about to perform, and also displays a time stamp.

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在这个程序之前，工程师和技术人员已经进行了测试运行、计算机建模培训和在一个仪器包模型上操作的培训。这是一个关键的任务操作。

Before the procedure, the engineers and technicians had trained with test runs, computer modeling and a mock-up of the instrument package. This is a critical mission operation.

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