Take care not to be impolite to customers.

注意不要对顾客失礼。

youdao

I think you need not to be impolite to her.

我认为你没必要对她讲礼貌。

youdao

There is no reason to be impolite to another person.

没有理由对别人无礼。

youdao

Also, not to be impolite or anything, but how expressive is a fish, until it hits a grill?

NEWYORKER: Finding Nemo

He understood that they were people of goodwill, and he could not bear to be impolite, but the benign interest of others was a burden.

CNN: Brought up to be a good man

In the US it can be seen as more than impolite to question religious-based beliefs.

BBC: Is the real Mitt Romney about to stand up?