He is an ideal opponent for me, never dirty.

对我来说他是个有创造力的对手，踢球不脏。

youdao

I'd never do the dirty on my friends.

我决不出卖朋友。

《牛津词典》

To my surprise, she never complained her hard and dirty work.

令我惊讶的是，她从来没有抱怨过她又苦又脏的工作。

youdao

I like the way she did that. She never said I was dirty or that I smelled bad.

VOA: special.2009.02.14

The dirty business of physical death never has to take place at all.

肮脏的肉体死了就永远不会发生。

耶鲁公开课 - 弥尔顿课程节选

Consider this: In a clean room, the couch never gets dirty.

FORBES: A New Drug To Treat Alzheimer's?

But he says he never approved a dirty war against the rebels.

BBC: Alberto Fujimori in file photo from 1999

Once the race began, he was a ruthless competitor (some preferred the term "dirty") who never seemed to go at less than his upper limit.

WSJ: Ayrton Senna | Aggression With Lucidity | By Richard B. Woodward