I know I was stupid; you don't have to rub it in.

我知道我当时很愚蠢；你不必老提这件事。

《牛津词典》

If you write on the blackboard, rub it off at the end of the lesson.

如果你在黑板上写字，下课时要擦掉。

《牛津词典》

If a small thing goes into your eye, don't rub it.

如果一个小东西进了你的眼睛，不要揉它。

youdao

Once they find the name, many rub a pencil on paper over the letters to copy it.

VOA: special.2009.05.25

Every time I drive the steering wheel of my car, I rub off some items. But that's OK, it's still the very same physical object.

每次我使用方向盘时，都会摩擦掉一些微粒，但没关系，它还是原来那个物体。

耶鲁公开课 - 死亡课程节选

Buff is also a soft cloth used to rub a surface until it looks bright and shiny.

VOA: special.2009.05.17

When you have landed that great job, it may be tempting to rub it in the faces of everyone who rejected you.

FORBES: Job Search Success is the Best Revenge

The crowd at the Foro Italico were treated to a clay court exhibition, particularly in the first set as the 26-year-old Spaniard broke Berdych a second time to rub it in.

CNN: SHARE THIS

That means that you have to rub it longer.

WSJ: DA: NY lawmaker conduct 'alarming' not criminal