英 [ˈnɒkɪŋ]
n. 爆震音；卡答卡答的故障声音；敲的声音
v. 敲，敲打；相碰，碰撞；把……撞击成（某种状态）；敲动，打破；打，凿（洞）（knock 的现在分词）
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
水锤
震性
爆震
敲击声
爆振
• 爆震 ( Knocking )指燃烧过程中在点火火 焰前锋到达之前，在残余未燃混合气 中引起的自燃发火。
当多连杆式发动机100在高负荷区域中运转时，为了防止爆振(knocking)，不管发动机转速如何，多连杆式发动机100的压缩比都被设定成例如较低压缩比。
... 爆发室||explosion chamber 爆击||knocking 爆击计||knock meter ...
红牌加点球，运气之神叩响(Knocking)了加纳队(Ghana)的大门(Door)，同时也叩响了非洲球队历史性的杀入世界杯四强的大门，你走的那天，我决定不掉泪，迎着风撑着眼帘用...
敲（knock的ing形式）
Somebody was knocking on the window.
有人在敲窗户。
He burst into the room without knocking.
他没敲门就闯进了屋子。
He marched into the kitchen without knocking.
他没敲门就快步走进了厨房。
I climbed the stairs to his apartment and went in without knocking.
VOA : special.2011.06.18
But in fact, if you just run your fingers again and again over this floppy disk you are disorienting those particles or knocking them off perhaps altogether, depending on the medium.
事实上，如果你把手指一次次的在磁盘上面滑动,这些粒子就会变的无极性,或者把它们整个搞坏，而这取决于媒介。
计算机科学课程节选 : 哈佛公开课
And once upon a time they actually were thinking about knocking it down
从前，人们也想过要拆毁它，
SpeakingMax英语口语达人 : 中央车站的历史
said that in the night she had been awakened, some men were knocking at the door, and they had been sent by Charles Taylor, and they had given her a huge diamond."
VOA : standard.2010.08.09
Michael Jackson's death led many of Pakistan's local television channels Friday morning, knocking the near constant coverage of the military campaign against Taliban militants off the top of the news lineup, if only for a few hours.
VOA : standard.2009.06.26
We were knocking down prices by hundreds of thousands by finding relevant prior art.
The tasks ranged from registering voters to knocking on doors in the blazing south Florida sun.
And hire someone who will immediately pick up a sledgehammer and start knocking down that wall.