youdao

You will understand the ways in which the software will get from any state to another state, and (very importantly) if you can define every operation, then you can track and undo it as well.

您将会理解软件从一个状态转到另一个状态的方式，而且（非常重要），如果您可以定义某个操作， 那么同样可以追踪并撤销它。

youdao

If something performs a single activity, then it really refers to a service operation.

如果执行单一活动，那么它实际上是指服务操作。

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If that fades, then the whole operation could collapse in frustration and disillusionment.

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However, if the cancer has spread into the bladder muscle, then a bigger operation may be needed.

BBC: Bladder cancer

However, they consistently approved the operation and one could argue that if a ten-year repayment was legal, then a forty-year repayment could also have been legal.

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