Using versioning, a copy of the document can be saved before the change occurs.

使用版本控制，在更改发生之前可以保存文档的一份副本。

youdao

These changes should be brought before the change board by the subsystem representative.

这些变更应该在变更委员会之前被子系统的代表提出来。

youdao

One of the model files, known as the base model, represents the database before the change.

其中一个模型文件（称作基础模型） 表示更改之前的数据库。

youdao

Then,in the final weeks before election day, the situation began to change.

VOA: special.2010.07.01

We looked at pressure change before, actually, in discussing the third law, the fact that the entropy goes to zero as the absolute temperature goes to zero for a pure,perfect crystal.

在讨论热力学第三定律的时候，我们讨论过压强变化,即对于纯净的完美晶体,随着温度下降到绝对零度熵也变成零。

麻省理工公开课 - 热力学与动力学课程节选

That doesn't solve the problem we had before though Then I'm going to append it, and keep the last change for future use.

这样没有解决我们之前的问题,所以我要给它加上一个值，让上一次的变化能够用到未来的例子中。

麻省理工公开课 - 计算机科学及编程导论课程节选

Prime Minister David Cameron rode with the hunt on six occasions before the change in legislation.

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The impact of changes in tax rates on tax revenue depends in part on the levels of taxation before the change.

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Before the change, law enforcement, intelligence and homeland security agencies and departments involved with the list "applied moderately different standards, " the official said.

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