A boy can be in hot water with his mother, if he comes into the house with dirty,wet shoes.

VOA: special.2009.05.10

There's just no dirty trick that anybody fails to do if it can.

各种卑鄙战术,无所不用其极

耶鲁公开课 - 古希腊历史简介课程节选

you can take clinics if you want to get your hands dirty and start practicing law,

如果你想要入行，开始做律师，你可以去法律实务班，

哈佛法学院的课程 - SpeakingMax英语口语达人

You have to learn, in other words, how to get your hands dirty. Between the innocence of the Christian and the worldliness of Machiavelli's new morality, there can be no reconciliation.

换句话说，你必须学会如何弄污你的手,在基督教的纯洁观与,马基雅维利新道德中的世俗观之间,没有任何回旋的余地。

耶鲁公开课 - 政治哲学导论课程节选