This work must be done at once.

这件工作必须立刻做。

youdao

This work must be finished before tomorrow.

此工作必须在明天以前完成。

youdao

This work must be done by you, and not by me.

这件工作必须由你做，而不是我来做。

youdao

Now,for this business to work, we must be able to produce a charming widow, with or without the beauty, as advertised."

VOA: special.2010.04.24

So this must be equal to work, right?

那么这个必须与功相等？

麻省理工公开课 - 热力学与动力学课程节选

Traditionally this is hard work that must be done by hand.

NPR: Guest-Worker Debate: Human or Mechanical Labor?

This must be our work.

WHITEHOUSE: Remarks by the President at the Diplomatic Corps Reception

We must be willing to shape this interdependent work and to embrace its interdependence, including our interdependence on others.

CNN: Bill Clinton Speaks To A Meeting Of Newspaper Editors