If the CFL should be used for lighting a particular space, or an object within that space, the fixture must be designed to work with that lamp, and the fixture with the room.

如果用节能灯来为某一特定空间或该空间内的某一物体照明，则必须设计能与这盏灯和这个房间协同运作的装置。

youdao

The work must be completed within a certain time limit.

这项工作必须在一定期限内完成。

《牛津词典》

All those concerned must work together in order that agreement can be reached on this issue.

一切有关人员必须通力合作，以便能在这个问题上达成协议。

《牛津词典》

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

But it's a good story, Joule decided that there must be a direct relationship between work and heat.

所以说，这只是一个不错的故事而已，焦耳认为功和热之间,一定具有某种直接的联系。

麻省理工公开课 - 热力学与动力学课程节选

It must not be easy to write your own work.

你自己创作一定很难。

写作课程比较难 - SpeakingMax英语口语达人

It must be the work of our nation and of all nations.

WHITEHOUSE: President Obama Speaks on Preventing Mass Atrocities

Here at home, Presidents Bush and Clinton will help the American people to do their part, because responding to a disaster must be the work of all of us.

WHITEHOUSE: Presidents Obama, Bush, & Clinton: Help for Haiti

Now, that must be our work here on Earth.

CNN: Commentary: Amen, Mr. President