我们必须要搞好交通运输工作。

We must do a good job in transport and communications.

youdao

我们必须要有耐心。

We must be patient.

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我们必须要让生产线运转起来，调制“虎牌牛奶”、清洗婴儿奶瓶、清洁地板。

We had to have a bit of a production line going, making up "tiger milk", washing baby bottles, and cleaning the floors.

youdao

We need to come up with an experiment in which the electron is going to be forced to behave as a wave.

我们得想出个实验,在这个实验中电子必须,要表现得像波一样。

麻省理工公开课 - 固态化学导论课程节选

How does that happen? You know, you've got to appeal to social forces if you're going to talk about change.

这是怎么回事？,谈到这个变化,我们必须要理解社会中的力量。

耶鲁公开课 - 文学理论导论课程节选

So, when we think about any type of formal charges, we have to assign these based on a formula here, which is very easy to follow.

那么，不管我们要考虑什么样的形式电荷，我们都必须依靠这个公式，它很容易理解。

麻省理工公开课 - 化学原理课程节选