
好词典

源自古英语 cnocian,意为'敲击',可能源自拟声词,模仿敲击的声音。
❶ 用手或物体轻击某物表面发出声响,通常是为了引起注意或试图进入某个地方。
“She knocked on the door three times before entering.”
(她敲了三下门才进去。)
“He knocked on the window to get her attention.”
(他敲了敲窗户以引起她的注意。)
❶ 用力撞击某物使其移动、倒下或损坏,通常是无意或意外的行为。
“He accidentally knocked the vase off the table.”
(他不小心把花瓶从桌子上撞掉了。)
“The car knocked over the street sign.”
(汽车撞倒了路标。)
knock out — 使某人失去知觉;在比赛中击败对手;快速完成某事。
“The boxer knocked out his opponent in the third round.”
(拳击手在第三回合击倒了对手。)
knock it off — 用于告诉某人停止做令人讨厌或恼火的事情。
“Knock it off! I'm trying to concentrate.”
(别闹了!我正在专心做事。)