我们必须掌握好劳资关系和降低成本的平衡。

We have to balance good labour relations against the need to cut costs.

《柯林斯英汉双解大词典》

毫无疑问，互联网时代，人们必须掌握良好的计算机技能才能获得一份好工作。

There is no doubt that in the Internet era, one must get a good command of computer skills to be successful in getting a good job.

youdao

这里是你必须掌握的一些原理。

Here are some principles you must master.

youdao

Aha! So to study and grasp things about dead bodies, corpses, you must yourself be a dead body.

所以为了研究并掌握关于尸体的知识,你自己必须先是一具死尸

耶鲁公开课 - 死亡课程节选

It's very easy to use. But something you really should master.

这个句型很容易就能学会，这也是你必须得掌握的一个句型。

When 课堂 - SpeakingMax英语口语达人

In other words, to understand and cope with the problems that we all face, we all need to know and to grapple with the Western experience.

换句话说,为了理解并解决我们所面对的问题,我们必须了解并掌握西方文明的经验

耶鲁公开课 - 古希腊历史简介课程节选