[no obj.]strike a surface noisily to attract attention, especially when waiting to be let in through a door
（为引起注意而）敲，敲打，（尤指）敲（门）
-
he strolled over and knocked on a door marked Enquiries .他踱步过去，敲了标有“问讯处”的门。
strike or thump together or against something
相撞，碰撞
-
my knees were knocking and my lips quivering .我双膝打颤，嘴唇发抖。
(of a motor or other engine)make a regular thumping or rattling noise, e.g. through pinking
（马达，引擎）发出碰撞声，发出爆发声。
[with obj.]collide with (someone or something), giving them a hard blow
撞到，撞击
-
he deliberately ran against her, knocking her shoulder 他故意贴着她跑，撞上她的肩膀
-
[no obj.]
he knocked into an elderly man with a walking stick .他撞到了一个拄着拐杖的老年人。
[with obj. and adverbial of direction]force to move or fall with a deliberate or accidental blow or collision
（有意或无意地）碰（或撞）；碰（或撞）落
-
he'd knocked over a glass of water .他碰翻了一杯水。
injure or damage by striking
打伤，碰伤
-
she knocked her knee painfully on the table 她的膝盖被桌子碰得很疼
-
figurative 〈喻〉you have had a setback that has knocked your self-esteem .你遇到了打击自尊心的挫折。
make (a hole or a dent) in something by striking it forcefully
打出（洞，坑）
-
he suggests we knock a hole through the wall into the broom cupboard .他建议我们在墙上打个洞，通到放清洁工具的壁橱里。
demolish the barriers between (rooms or buildings)
敲掉（房屋、建筑之间的障碍）
-
two of the downstairs rooms had been knocked into one .两间楼下的屋子已经被凿通成一间了。
〈非 正式〉 挑剔，批评。
[with obj.]
〈非正式〉 达到（一定年龄）
-
he's younger than his brother — knocking seventy .他比他哥哥年轻—— 快７０岁了。
a sudden short sound caused by a blow, especially on a door to attract attention or gain entry
敲打声，（尤指）敲门声。
[mass noun]a continual thumping or rattling sound made by an engine
（发动机）轰鸣声。
a blow or collision
撞击，碰撞
-
the casing is tough enough to withstand knocks .包装很结实，足以抵抗碰撞。
an injury caused by a blow or collision
打伤，撞伤。
a discouraging experience; a setback
挫折
-
the region's industries have taken a severe knock .该地区的各种产业经历了一场严重挫折。
〈非正式〉 批评。
【板球】 〈非正式〉 （尤指单个击球手的）击球回合
-
a splendid knock of 117 against Somerset .对萨姆塞特队打出的得了１１７分的绝妙击球回合。
-
knock someone's block off informal hit someone very hard in anger 〈非正式〉 怒打 -
knock the bottom out of 见BOTTOM. knock someone dead informal greatly impress someone 〈非正式〉 给某人留下深刻印象 -
knock someone for six 见SIX. knock people's heads together 见BANG 条1 bang people's heads together .knock something into a cocked hat 见COCKED HAT. knock someone into the middle of next week informal hit someone very hard 〈非正式〉 猛打某人 -
knock someone （或something ）into shape 见SHAPE. knock it off informal used to tell someone to stop doing something that one finds annoying or foolish 〈非正式〉 ［用于告诉某人停止做烦人或愚蠢的事］住手，别闹了 -
knock someone on the head stun or kill someone by a blow on the head（打头部）打昏；打死 -
knock something on the head Brit .informal prevent an idea, plan, or proposal from being developed or carried out 〈英，非正式〉 扼杀，打消（想法，计划，建议） -
knock on wood 见WOOD 条touch wood .knock someone's socks off 见SOCK. knock spots off Brit .informal easily outdo 〈英，非正式〉 轻松地胜过 -
the school of hard knocks painful or difficult experiences that are seen to be useful in teaching someone about life（有教育意义的）困苦经历 -
you could have knocked me （或her ,him , 等）down with a feather informal used to express great surprise 〈非正式〉 我（或她、他等）极为惊讶
-
knock about （或around ）informal travel without a specific purpose 〈非正式〉 漫游，漂泊for a couple of years she and I knocked around the Mediterranean . 我和她在地中海漫游了两三年 -
happen to be present 碰巧在场
it gets confusing when there are too many people knocking about . 这么多的人碰巧在场，气氛显得混乱 -
chiefly Brit . spend time with someone 〈主英〉 陪伴（某人）she knocked around with artists . 她陪着艺术家们 -
knock someone／thing about （或around ） injure or damage by rough treatment（因粗暴对待而）损害，伤害 -
knock someone back Brit .informal 〈英， 非正式〉1 reject or discourage a person or their request or suggestion 拒绝某人，挫伤某人 -
2 cost someone a specified, typically large, amount of money 花掉某人一大笔钱buying that house must have knocked them back a bit . 买下那幢房子一定花费了他们一大笔钱 -
knock something back 1 informal consume a drink quickly and entirely 〈非正式〉 （快速地）喝下，喝掉 -
2 work risen dough by vigorous kneading to expel air before baking（烘烤前）揉发好的面团 -
knock someone down （或over） chiefly Brit. （especially of a vehicle） strike or collide with someone so as to cause them to fall to the ground 〈主英〉（尤指机动车）撞倒（某人）I was nearly knocked down by a bus. 我差点被一辆公共汽车撞倒 -
knock something down 1 demolish a building or other structure 拆掉，拆毁（大楼等建筑物）the closely packed terraced houses were knocked down in the interests of ‘progress’ . 为了体现“进步”，排得很密的联立房屋被拆掉了 -
take machinery or furniture to pieces for transportation（为方便运输）拆开机器（或家具）
-
2 （at an auction） confirm the sale of an article to a bidder by a knock with a hammer（拍卖中）击锤确认买主 -
informal reduce the price of an article 〈非正式〉 减低物品价格 -
3 US informal earn a specified sum as a wage 〈美， 非正式〉 挣（一定额度的）工资 -
4 Austral./NZ informal spend a pay cheque freely 〈澳／ 新西兰，非正式〉 大手大脚地花用工资 -
［ORIGIN with reference to spending money on alcohol （compare with
knock back ）．］knock off informal stop work 〈非正式〉 停止工作，收工 -
knock someone off 1 informal kill someone 〈非 正式〉 杀死某人 -
2 Brit .vulgar slang have sexual intercourse with a woman 〈英，粗俚〉 与女人性交 -
knock something off 1 informal produce a piece of work quickly and easily, especially to order 〈非 正式〉 （尤指按要求）快速而轻松地完成工作 -
2 informal deduct an amount from a total 〈非正式〉 从总量中减去（或扣除）一部分when the bill came they knocked off ￡600 because of a little scratch . 账单收到时，他们因一点擦痕减掉了600英镑 -
3 Brit .informal steal something 〈英，非正式〉 偷东西 -
N .Amer .informal rob a shop or similar establishment 〈北 美，非正式〉 抢劫商店等 -
informal make an illegal copy of a product 〈非 正式〉 仿冒，非法复制 -
4 Cricket score the total needed for victory【板球】 取得得胜分there was plenty of time for the Middlesbrough batsmen to knock off the runs . 有足够的时间让米德尔斯布勒的击球手取得得胜分 -
knock on 1 informal grow old 〈非正式〉 变老don't you think you're knocking on a bit for this? 你不认为你正为此变老吗？2 （亦 作knock the ball on ）Rugby illegally drive the ball with the hand or arm towards the opponents' goal line【英橄】 （犯规动作）以手或臂向对方球门线传球 -
knock someone out 1 make a person unconscious, typically with a blow to the head （尤指击头部）打昏 -
knock down （a boxer） for a count of ten, thereby winning the contest（拳击中）判败击倒（指击倒对手使其从1数到10的时间之内不能站起，从而取胜）
-
（
knock oneself out ）informal work so hard that one is exhausted 〈非正式〉 筋疲力尽 -
informal astonish or greatly impress someone 〈非正式〉 使震惊，给…留下深刻印象 -
2 defeat a competitor in a knockout competition（淘汰赛中）击败对手England had been knocked out of the World Cup . 英格兰已被淘汰出世界杯 -
knock something out 1 destroy a machine or damage it so that it stops working 破坏机器（使其不能运转） -
destroy or disable enemy installations or equipment 破坏（敌方装置设备），使（敌方装置设备）瘫痪
-
2 informal produce work at a steady fast rate 〈非正式〉 快速地做if you knock out a thousand words a day you'll soon have finished . 如果你每天写出1,000 字，你将会很快完成 -
3 empty a tobacco pipe by tapping it against a surface 磕净（烟斗），敲空（烟斗） -
4 Austral.／NZ informal earn a specified sum of money 〈澳／ 新西兰，非正式〉 赚（某一数量的）钱 -
knock someone over another way of sayingknock someone down . 同knock someone down .knock something over N .Amer .informal rob a shop or similar establishment 〈北 美，非正式〉 抢劫（商店等） -
knock someone sideways informal astonish someone 〈非正式〉 使震惊 -
knock something together assemble something in a hasty and makeshift way 匆匆拼凑，草草做成 -
knock up Brit .informal （in a racket game） practise before formal play begins 〈英，非正式〉 （使用球拍的体育运动项目）赛前练习 -
knock someone up 1 Brit . wake or attract the attention of someone by knocking at their door 〈英〉 敲门唤醒（或引人注意） -
2 informal make a woman pregnant 〈非正式〉 使怀孕 -
knock something up 1 Brit . make something in a hurry 〈英〉 仓促制成 -
2 Cricket score runs rapidly【板球】 得分快速上升
-
knock at one's/the door 敲...的门
真题例句：
-
knock sth over 把...撞倒
真题例句：
-
knock sth down 把...撞倒
真题例句：
-
knock sth off 把...碰掉
真题例句：
-
knock into sth 撞上...
真题例句：
-
knock out sth 击败...
真题例句：
"Old English
