英 [nɒk] 美 [nɑːk]
v. 敲，击；碰撞，碰倒；把……撞击成（某种状态）；敲动，打破；打，凿（洞）；（尤指因故障）发碰撞声，嘭嘭作响；挑剔，无端指责；踢（球）；<非正式>达到（一定年龄）；（心）怦怦跳，（膝盖）打哆嗦
n. 敲打声，（尤指）敲门声；打击，捶击，撞击；<非正式>困难，挫折；（发动机）轰鸣声；<非正式>批评；<非正式>（尤指单个击球手的）击球回合；撞伤，撞坏之处
复数knocks
第三人称单数knocks
现在分词knocking
过去式knocked
过去分词knocked
knock /nɒk/ CET4 TEM4 [ knocking knocked knocks ]
不及物动词 If you knock on something such as a door or window, you hit it, usually several times, to attract someone's attention. 敲
She went directly to Simon's apartment and knocked on the door.
她径直走到西蒙的住处，敲了敲门。
可数名词 Knock is also a noun. 敲的声音
They heard a knock at the front door.
他们听到前门有一敲门声。
单数型名词 敲的声音
They were wakened by a loud knocking at the door.
他们被一阵很响的敲门声吵醒。
及物动词 If you knock something, you touch or hit it roughly, especially so that it falls or moves. 碰撞
She accidentally knocked the glass off the shelf.
她无意中把架子上的玻璃杯碰了下来。
可数名词 Knock is also a noun. 碰撞
The bags have tough exterior materials to protect against knocks, rain, and dust.
这些袋子结实的外层材料有防撞、防雨、防尘的作用。
及物动词 To knock someone into a particular position or condition means to hit them very hard so that they fall over or become unconscious. 重击
The third wave was so strong it knocked me backwards.
第3个浪头如此猛烈，把我击得往后退。
及物动词 To knock a particular quality or characteristic out of someone means to make them lose it. 使失去
The school system is designed to knock passion out of people.
学校体制是设计来抹杀人的激情的。
及物动词 If you knock something or someone, you criticize them and say unpleasant things about them. 批评; 指责
I'm not knocking them: if they want to do it, it's up to them.
我不是在说他们的坏话：如果他们打算做这件事，由他们决定。
可数名词 If someone receives a knock, they have an unpleasant experience which prevents them from achieving something or which causes them to change their attitudes or plans. 打击
to knock someone or something into shape→seeshape
rap with the knuckles
knock on the door
knock against with force or violence
同义词： bump
find fault with; express criticism of; point out real or perceived flaws
Don't knock the food--it's free
同义词： criticize / criticise / pick apart
爆震-引用次数：45
The results show that the knock frequency band of compound combustion is between 5 and 10 kHz.
负荷和预混合燃料性质对复合燃烧爆震频率带影响不大。
爆震-引用次数：10
On this base, we designed the ECU hardware and software of the knock feedback controlling ignition system.
分析了爆震以及爆震对发动机的影响,并在此基础上实现了爆震反馈汽油机点火的电控单元的硬件与软件的设计。
敲击
敲击术
爆震
敲击声
... afford v 有足够的(钱/时间)做(某事) knock v 敲,击 knock at phr. 敲(门,窗等) ...
... 感动性 emotionality 使感动 affect; knock; penetrate; thrill; touch 无感动 acathexis ...
... 蒙住声音: muffle 故障声音: knock 危险声音: danger sound ...
... 名字: Knock 姓: Shirley 标签: Shirley Knock ...
knocker 门环；敲击者；吹毛求疵的人
Knock before you enter.
进来前先敲门。
You don't have to knock—just walk in.
不必敲门—进来就是了。
They heard a knock at the front door.
他们听到前门有一敲门声。
The first breath that blows will knock me to the ground.
VOA : special.2010.02.27
It's the problem that sometimes people knock over an oil lamp in their home and they burn their own house down.
有时候会出现这种问题,一个人把自己家里的油灯弄翻了,然后把自己的房子点着了
金融市场课程节选 : 耶鲁公开课
So, the bowlers do their bowling and sometimes they knock down all the pins, which is called a what? A strike.
投球手投球时,有时他们撞到了所有障碍物，这叫什么呢，全打。
心理学导论课程节选 : 耶鲁公开课
From nineteen seventy one, here is "Don't Knock My Love."
VOA : special.2009.08.21
A loud knock awaken the old man.
VOA : special.2009.02.28
It is no knock on him to say that he has 210 so far.
This will typically tend to have a knock on effect on lowering annuity rates.
"The season hasn't been great for farmers and that has had a knock-on effect for everyone, " she said.