PHRASAL VERB 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 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。
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