knock off ( knocking, knocked, knocks )

• 1. 

  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)

  例：

  We have knocked 10% off admission prices.

  我们已将入场票的价格降低了10%。

• 2. 

  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]

  例：

  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。