Peter told john to knock if off when he kept on punching him on him arm.

彼得叫约翰停止胡闹，当他猛捶彼得的手臂时。

youdao

If I get this report finished I'll knock off early.

如果我完成这个报告就会早点儿下班。

《柯林斯英汉双解大词典》

So if we were to 'reset' the world of wealth, we should just knock off about a third.

因此，如果要我们“重新设定”富人世界，我们应该直接减掉三分之一左右。

youdao

But it will be a long time before Apple will be able to knock off RIM--if ever.

FORBES: Can iPhone Beat BlackBerry?

If you are planning to knock off a leader, it is far better to use a gun.

ECONOMIST: Killing a leader doesn't always work

But they are often imitative opportunists: if somebody makes a fortune selling knock-off purses, a dozen others will rush in to do the same thing.

ECONOMIST: The tiger and the tech