现在大家来尝试着练习其中一个。

Now you try to use one of these.

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作为练习，稍后我们故意使其中一个设备出现故障来证明这一点。

As an exercise, we will deliberately fail one of our devices later, to demonstrate this.

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他们能够共同完成一个练习，其中包括使用大型机和传统的分区数据集(PDS)编译、执行和调试COBOL程序。

They were able to work together on the same exercise, which involved compiling, executing, and debugging a COBOL program using the mainframe and traditional partitioned data sets (PDS).

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