| 词汇 | knock |
| 释义 | knock verb uk /nɒk/ us /nɑːk/ knockverb (MAKE NOISE)B1[ I ] to repeatedly hit something, producing a noise: （反复地）敲，击，打 knock onShe knocked on the window to attract his attention.她敲敲窗想引起他的注意。 Our neighbours knock on the wall if they think we're making too much noise. knock atThere's someone knocking at the door. Please knock before entering.进来前请先敲门。 [ I ] engineering specialized If an engine is knocking, it is producing a repeated high sound either because the fuel is not burning correctly or because a small part is damaged and is therefore allowing another part to move in ways that it should not.（发动机）发爆震声，砰砰作响 [ I ] If something such as a pipe knocks, it makes a repeated high sound.（管子等）发碰撞声 to make a sudden loud sound bangThe door banged shut. knockI know when the heating is on because the old radiator begins to knock and hiss. crackThunder cracked right before it began pouring and we ran for cover. clankI could tell he was upset by the way the pots clanked in the sink while he was washing up. clangChurch bells clanged in the distance. clashThe children covered their ears whenever the cymbals clashed. I wish he'd knock instead of just barging in.我希望他进来前要敲门而不是直接闯入。 He knocked quietly before entering the room. She knocked on the table to get our attention. She never knocks before she comes in. Knock three times, then I'll know it's you. Hitting against objects accidentally and colliding anti-collision anti-shock bang around bowl someone over bump into someone catch collide collision crash head-on jarring jog knock someone down knock someone over plough plough into something/someone rear-end smash something up stack up stub You can also find related words, phrases, and synonyms in the topics: Sounds made by objects, movement or impact knockverb (HIT)B1[ I+ adv/prep, T ] to hit, especially forcefully, and cause to move or fall: 碰，撞；碰倒；撞倒 knock something off somethingHe accidentally knocked the vase off the table.他不小心把花瓶碰下了桌子。 knock something against somethingShe knocked her head against the wall as she fell.她跌倒时头撞在墙上。 [ + obj + adj ]Some thug knocked him unconscious. knock someone/yourself unconsciousShe was in a car accident that briefly knocked her unconscious. knock someone/yourself senselessHe stood on a rake and knocked himself senseless. knock a hole inShe took a hammer and knocked a hole in the wall.她拿锤子在墙上砸了一个洞。 See also knocksomething over knock through something(also knock (something) into something) If you knock one room into another room, or knock through a room, you remove the wall between one room and the next so that they form one room: 把（两个房间）打通 We're planning to knock the kitchen into the dining room to make one large eating space. The force of the wind knocked my hat off. I knocked over a cup of tea. The chair knocked against the lamp. She knocked her head on the cupboard door. Mind you don't knock the glass over. Hitting against objects accidentally and colliding anti-collision anti-shock bang around bowl someone over bump into someone catch collide collision crash head-on jarring jog knock someone down knock someone over plough plough into something/someone rear-end smash something up stack up stub knockverb (CRITICIZE)[ T ]UKinformal to criticize, especially unfairly: 指摘;挑剔 Don't knock him - he's doing his best.别挑他的刺了——他已在竭尽全力了。 to show disapproval of someone or something criticizeHe criticized the government's handling of the crisis. attackShe wrote an article attacking the judge and the way the trial had been conducted. condemnShe was condemned for her comments about the candidate. denounceThe government's economic policy has been denounced on all sides. come under fireThe government programme has come under fire for mismanaging funds. Disapproving & criticizing anathematize animadversion aspersion aw backbite barrel bash belabour boo disapprobation excoriate knocker let someone have both barrelsidiom low blow mordacious mordancy nitpicker pile slam union-basher Idiomsbe knocking (on) 60, 70, etc. knock someone's block off knock someone for six knock something on the head knock (some) sense into someone knock someone sideways knock on wood knock 'em dead! knock it off knock spots off something knock the bottom out of something knock, knock! you could have knocked me down/over with a feather Phrasal verbsknock around knock around (something) knock someone around knock someone back knock someone back something knock something back knock someone down knock someone/something down knock something down knock off (something) knock something off (something) knock something off knock someone off knock (something) on knock someone out knock yourself out knock something out knock something out of someone knock someone over knock something over knock something together/up knock up knock someone up knock noun[ C ] uk /nɒk/ us /nɑːk/ knocknoun[C] (NOISE)a sudden short noise made when someone or something hits a surface: 敲击声 knock onThey heard a knock on the window. He said, with a knock on the wooden table, that he was "absolutely fine". knock atThere was a knock at the door. Sounds made by objects, movement or impact bang around bleep boop choo-choo chuff clap along click away crunch honk plop resonance rumble spit squeak swoosh thrum thunk tick-tock ticking tinkly knocknoun[C] (HIT)the act of something hard hitting a person or thing: （重重的）一击，敲击 knock onHe received a nasty knock on the head from a falling slate.一块石板掉下来把他的头重重地砸了一下。 Hitting against objects accidentally and colliding anti-collision anti-shock bang around bowl someone over bump into someone catch collide collision crash head-on jarring jog knock someone down knock someone over plough plough into something/someone rear-end smash something up stack up stub Idiomsthe knock at/on the door take/have a knock knock | American Dictionaryknock verb us/nɑk/ knockverb (MAKE NOISE)[ I ] to repeatedly hit something, producing a noise: Someone is knocking at the door. Jane knocked on the window to attract his attention. [ I ] If an engine is knocking, it makes a repeated noise because of a mechanical problem. knockverb (MOVE)[ T ] to push into something or someone, often forcefully, causing the thing or person to move: Alice accidentally knocked the pot off the table. The blast knocked him off his feet. knockverb (CRITICIZE)[ T ]infml to criticize, esp. unfairly: She knocks every suggestion I make. Idiomsknock it off knock on wood Phrasal verbsknock something off (something) knock down something/someone knock down something knock off (something) knock out someone knock out something/someone knock over something/someone knock | Business Englishknock verb[ T ] uk /nɒk/us to cause a sudden and unexpected change in something such as prices: His downbeat assessment knocked the company's share price enough to ensure that it failed to rejoin the FTSE 100. Analysts have warned that price cuts and slowing sales would knock profits. to affect someone or something badly: The hotel and conference sector has been knocked sideways by a catalogue of problems in recent years. Manufacturing redundancies in the area are knocking buyers' confidence. be knocked by sthThe financial markets were badly knocked by the week's political turmoil. informal to criticize something or someone: Critics may knock the company, but it's still a good investment. You can knock him for some things, but you have to give him credit for his record. come knockinginformal to visit or talk to someone in order to ask for something: We assist small companies that want to expand their capabilities - if they come knocking, we don't turn them down. knock on/at sb's doorinformal to talk to a person or an organization because you want them to help you, or you want to join them: In the two years since it launched its first plan, nearly 218,000 investors have knocked on its door. In 1911, 39 per cent of Britain's working women were domestic servants, now they are knocking at the boardroom door. knock sth on the headUKinformal to prevent something from happening, or to finally finish something: The company knocked housing market concerns on the head with a 32% rise in full-year profits. knock spots off sth/sbUKinformal to be much better than something or someone else: This ingenious colour viewfinder knocks spots off current LCD displays. knock sth/sb into shapeinformal to take action to get something or someone into good condition: His arrival on the board has finally knocked the company into shape. knock the bottom out of sth to damage something severely, especially by destroying its support: The rise in mortgage rates really knocked the bottom out of the housing market. Phrasal verbsknock sb/sth back knock sb down knock sth down knock sth from sth knock off (sth) knock off sth knock sth off (sth) knock sth out knock noun[ C ] uk /nɒk/us a situation in which something is badly affected: Sales of champagne were up over the key Christmas period despite earlier fears of a knock in consumer confidence. informal a bad experience: take/suffer/have a knock In him, we see a man, toughened by his share of hard knocks, who's had to struggle for every success. a criticism of someone or something: a knock on sb/sthThe biggest knock on internet phones is that they're only as reliable as your broadband connection. Examples of knockknock Here they knock out electrons from inner electronic shells of the atoms, producing core holes. This finding sheds a critical light on the use of "organ scarcity" as a moral knock-out phrase. However, in the knock-on source calculation, the thermal motion of background fuel ions was neglected. Heterozygous knock-out mice for brain-derived neurotrophic factor show a pathway-specific impairment of long-term potentiation but normal critical period for monocular deprivation. However, there are several limitations to using knock-out mice to study gene function. This is a strong argument, though it is not a knock-down proof for several reasons. And young audiences found the slapstick and knock-about violence appealing. He actually went down to see them and knocked on doors. The most commonly produced transitive verbs were knock and do (mostly present progressives and past tense uses). In another incident, a policeman who tried to stop a confrontation between warring factions was knocked unconscious when both groups turned on him. The ' second hits ' occurs during embryogenesis and knocks out the remaining normal copy allele. The development of knock-outs in the rat, however, will require that animals be produced from other more abundant cells or from cultured cells. The other thing he said to me was that you don't knock something when it is working. If knock-out criteria are being used, which criteria and why they were chosen should be clearly stated. Such gossip, if leaked, will certainly jeopardize the social status of the family with knock-on effects on all marriageable youths in their kin group. See all examples of knock These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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