这意味着我们需要定义在一个句子中名词和动词应该安排在什么位置。

This means we need to define where nouns and verbs should be arranged in a sentence.

youdao

现在我们需要定义参数。

Now we need to define the parameters.

youdao

我们需要定义如下转换。

We need to define the following transitions.

youdao

But remember that we need to multiply it by the volume here, the volume of some sphere we've defined.

但记住我们需要把它乘以体积，乘以一个我们定义的壳层的体积。

麻省理工公开课 - 化学原理课程节选

It would be much better if you had a reference point that didn't care where the pressure was.

我们还需要精确地定义气压,你必须知道气压的大小,当然如果我们能找到一个。

麻省理工公开课 - 热力学与动力学课程节选

The message I'm trying to get to here, because I'm running you right up against time, is I have to be careful about what's a primitive step.

我想说的事情是，因为我正在跟大家讲算法时间复杂度，我们需要注意一个基本步骤的定义,如果我可以假设。

麻省理工公开课 - 计算机科学及编程导论课程节选