It must work in extreme conditions.

它必须能够在极端环境下正常工作。

youdao

Since it is a kind of equipment, it must work well.

既然它是一种设备，那它就必须运转良好。

youdao

It must work - for the legal profession, and for the future of our great nation.

必须工作——为了法定职业，为了伟大国家的未来。

youdao

Deputy-President Motlanthe said to adequately commemorate the victims of the anti-apartheid struggle, government must work harder to improve the lives of those who have not benefited from it.

VOA: standard.2010.03.21

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

So, if evolution is to produce change, it must work more by the accretion of new components than by the continuous re-engineering of existing ones.

ECONOMIST: The first complete DNA sequence of an animal is now in the bag

It must work hard to safeguard their humanity and their dignity.

BBC: Fawzia

The trouble is that evolution has to make compromises, since it must work with the materials at hand, often while trying to solve several challenges at once.

NEWYORKER: It Ain��t Necessarily So