在花出去辛辛苦苦挣来的钱之前，你要确保物有所值。

Before you part with your hard-earned cash, make sure that you are happy that you are getting value for money.

《柯林斯英汉双解大词典》

注意您需要在创建进度条 之前设置这些值。

Note that you need to set these settings before you create the progress bar.

youdao

例如，数据消息可以选择包含“之前”的数据值。

For example, a data message may optionally contain the "before" data values.

youdao

All right. Then we're going to set low to-- low and high, and we're going to perform exactly the process I talked about.

不满足条件,我们就可以直接停止运行了，好，接下来我们要定义边界值,然后按照我之前。

麻省理工公开课 - 计算机科学及编程导论课程节选

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

In order to compute using this formula you have to know the true probabilities.

使用这些公式之前,必须知道真实的概率值是多少

耶鲁公开课 - 金融市场课程节选