Have/with your nose in the air
Have a snobbish or disdainful attitude
鼻孔朝天，目中无人
- She walked past me with her nose in the air.
她旁若无人地从我身边走过。
Keep your nose clean
Avoid trouble or situations that compromise one’s honesty
不惹事生非，安分守己
- I'd only been out of prison three months, so I was trying to keep my nose clean.
我刚刚出狱3个月，所以尽量安分守己。
On the nose
Precisely, at an exact time
（常指钱或时间）准确无误
- Her description of the play was right on the nose.
她对这部戏的描述真是分毫不差。
Right under (one’s) nose
In an obvious location, yet overlooked
就在（某人）眼前
- I spent all morning looking for the book, and it was right under my nose the whole time.
我花了一早上的时间找这本书，原来它一直就在我眼皮底下呢。
It’s no skin off my (your) nose (back)
The outcome will not affect me personally
与（某人）毫不相干；（某人）毫不在乎
- It's no skin off my nose if you don't take my advice.
如果你不听我的建议，我一点儿也不在乎。
Stick your nose into something
Intrude into something that is not your affair
干涉与自己无关的事
- You’re always sticking your nose into my business.
你总是瞎掺和我的事。
Powder one’s nose
To use the restroom (lavatory)
（如厕的婉转说法）补妆
- Would you get me another drink while I go and powder my nose?
我去补补妆，你能不能再帮我要杯酒？
Keeping one’s nose to the grindstone
Working hard on something repetitive or tedious
长时间苦干
- She kept her nose to the grindstone all year and got the exam results she wanted.
她整整一年勤奋苦学，终于取得了满意的考试成绩。
Have a nose for
To have natural ability at something
擅长寻找…；有发现…的能力
- As a reporter, he had a nose for a good story.
身为记者，他善于挖掘好题材。
