keep one's nose clean行为检点，守规矩

If you don't learn how to keep your nose clean, you're going to end up in jail.

如果你不学会守法, 你会进监狱的

After he came out of prison, he was determined to keep his nose clean.

出狱以后,他下决心要安分守己。

They have to keep their noses clean or they might be expelled from school

学生们必须守规矩，不然就可能被学校开除

take over接管， 接替

May I take over the driving?"

需要我替换一下你吗？

He will take over the company after his father retired.

他的父亲退休后，他将接管公司

歌曲：orianthi唱的believe