Stick to your principles and tell him you won't do it.

要恪守自己的原则，告诉他你绝不会干的。

《牛津词典》

It won't do you any harm to climb a little more, and will do all the others good.

再爬一会儿对你没有什么坏处，对别人都有好处。

youdao

If you do, you won't be able to handle it and the whole thing develops into an unpleasant scene and that ruins everyone's day.

如果你这样做了，你将无法处理好它，整个事情发展成一个不愉快的场面，那会毁了每个人的心情。

youdao

But Suat Kiniklioglu,spokesman for the Turkish parliamentary foreign affairs committee, says Turkey won't do so until the EU honors it commitment to Turkish Cypriots.

VOA: standard.2009.10.15

So, all you will have the opportunity to solve differential equations in your math courses here. We won't do it in this chemistry course. In later chemistry courses, you'll also get to solve differential equations.

你们在数学课中有机会,遇到解微分方程,我们在这化学课里就不解了,在今后的化学课程里，你们也会遇到解微分方程的时候。

麻省理工公开课 - 化学原理课程节选

Whatever it is, you've got to learn to transform them, but I won't do them.

不管是什么,你得学会换算,但我就不去做了

耶鲁公开课 - 基础物理课程节选

Now, in the harsh light of what she has just learned, she is aware that it won't do to shrug it all off.

NPR: Somalia's Farah: Humanizing a Broken Place

Theoretically, once the program is launched nationwide (which GM says it believes it will do) auto buyers won't have to visit dealerships anymore.

BBC: General Motors' e-gamble

But the government is now saying that's on the table but Treasury won't say they're definitely going to do it.

NPR: Why Haven't Credit Problems Been Resolved?