在山上，他必须用低速挡。

On hills, he must use low gears.

《柯林斯英汉双解大词典》

他必须学会使自己适应这项工作的节奏。

He'll have to learn to pace himself in this job.

《牛津词典》

他必须按照目前的市场价格出售这套房子。

He must sell the house for the current market value.

《柯林斯英汉双解大词典》

There is no border in the West. So Sal has to reinvent one, and in some sense it's a border of time.

西部里本身没有什么分界线，所以萨尔必须新发明一个，他所分的界限可以说按照时间来的。

耶鲁公开课 - 1945年后的美国小说课程节选

So in order to fill them, he would have to have eight electrons or an octet around the cubes.

因此为了填满它们，他必须放上八个电子或者说一个“八隅体“,在立方体周围。

麻省理工公开课 - 化学原理课程节选

Redleaf went in and said, you should really do it and he convinced them, apparently, and they cut their dividend.

莱德利夫提出,你们必须要这样做,而且他说服了管理层,最终经营者决定降低红利

耶鲁公开课 - 金融市场课程节选