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knock sth off (sth) (从价格中)减去,除去
The manager knocked $5 off because it was damaged.
因为有破损,经理将价格降低了5美元。
knock up (网球等运动中)赛前练习,赛前试打
The players have a couple of minutes to knock up before the match starts.
开赛前运动员有几分钟时间练球。
今日总结
knock the door 破门而入
knock at/on the door 敲门
the knock at/on the door 警察(或士兵)到家里来把某人带走
knock knock 敲门
俚语
be knocking (on) 60, 70, etc. 快60/70岁等(通常指高龄)
knock (some) sense into sb 让(某人)懂道理
knock on wood 老天保佑
knock it off 住嘴;住手
knock sb sideways/for six 使(某人)惊呆;使(某人)大病一场
短语
knock around 闲呆着,悠闲地打发时间/(和某人)长时间在一起
knock around (sth) (某人长时间)漫游,游荡;(某物长时间)散置在(某处)
knock sb/sth down 击倒,打倒,撞倒/降价;说服(某人)降价;杀(某人的)价
knock off (sth) 停止(工作);下班
knock sth off (sth) (从价格中)减去,除去
knock up (网球等运动中)赛前练习,赛前试打