Knock-Off Lamp保龄灯
knock-off block停泵装置
knock bit off松开钻头与钻柱间的固定销
Knock if off少来这一套
knock-off post可连接的接合器;可连续的接合器
knock sb off把某人从
knock block off使某人吃苦头
knock spots off彻底打败
knock it off别再讲下去了;少来这一套;停止
PHRASAL VERB（动词词组） To knock off an amount from a price, time, or level means to reduce it by that amount. 减去 (一定数额)
We have knocked 10% off admission prices.
我们已将入场票的价格降低了10%。
PHRASAL VERB（动词词组） When you knock off, you finish work at the end of the day or before a break. 歇工; 下班 [非正式]
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。