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.

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。

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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.

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。

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