knock off

基本解释

Say, Charlie, do you know it’s already six o’clock? Time to knock off. We can finish painting this room tomorrow.
这个人说:“我说呀,查理,你知道现在已经六点钟了吗? 该停工啦。我们可以明天来把这间房间粉刷完。”
There was a group of us on the western side who used to all try to knock off the top level of the wall before the cement had time to try.
在西柏林这边，我们是一大伙子，一直尝试着在柏林墙上的水泥干燥前敲掉最上面的墙块。
As a check, the researchers sequenced the DNA from some of the flourishing spots (a Mycoplasma genome is the sort of thing a modern sequencing set-up can knock off before its morning coffee).
作为一种检测，研究人员在一些繁殖茂盛的斑点处对DNA测序（支原体基因组这种东西现代测序技术可以在早晨喝完咖啡前搞定）。

The real prize for Electronic Arts is the opportunity to knock off Take-Two's money-losing sports business.
FORBES: Why EA Doesn't Need Rockstar
For all its fabulous costs and foibles, Hollywood will be hard to knock off its perch.
ECONOMIST: Hollywood's fading charms
From this yield you should knock off 0.6% to cover defaults and the unfavorable effects of calls (early redemptions).
FORBES: Rational Expectations

To knock off an amount from a price, time, or level means to reduce it by that amount.
When you knock off, you finish work at the end of the day or before a break.