我们必须要用左边那部。

We must use the one on the left.

youdao

连线： 为什么必须要用信用卡？

Wired: Why is a credit card necessary?

youdao

你必须要用声音信号，来确定单词之间的界线。

You have to use sound signals to figure out the boundaries between the words.

youdao

In any case, since Brooks does constantly use these terms, I have to overcome embarrassment and at least at times use them myself.

无论如何，由于布鲁克斯来回来去地用这两个词，那我就必须不怕尴尬，至少也要自己运用一次，讲给你们听。

耶鲁公开课 - 文学理论导论课程节选

If the question of time is not explicitly brought up, then you should know that you have to use this formula.

如果时间的问题并没有明确提出,那你应该知道,必须要用这个式子

耶鲁公开课 - 基础物理课程节选

They had to cooperate with other people that they owe a debt to society and that that's expressed in taxation.

必须与他人合作,所以他们欠社会的,所以要用纳税来还。

耶鲁公开课 - 公正课程节选