knock的例句是：用作动词(v.)Someone is knocking at the door.有人在敲门。knock过去式:knocked；过去分词:knocked；现在分词:knocking；第三人称单数:knocks。knock【近义词】blame。
一、详尽释义点此查看knock的详细内容
二、双解释义
三、网络解释
1. knock的反义词
1. 敲缸：辛烷值是用来表示燃料发生敲缸(Knock)倾向,也就是发生自燃(Autoignition)倾向的指标. 人为地把异辛烷(isooctane)的辛烷值定为100,把正庚烷(n-heptane)的辛烷值定为零,在标准的火花点火试验机上试验,
2. knock
2. 敲击：热控制阀(Heat-Control Valve) 在引擎排气歧管中一种节温操作阀门,可在引擎未达正常工作温度之前,将废气的热导入进气歧管. 敲击(Knock) 随引擎速度出现的金属撞击声,通常是因轴承松脱或磨损所产生. 主轴承(Main Bearing) 引擎内支撑曲轴的轴承.
四、例句
Someone is knocking at the door.
有人在敲门。
One may knock to signal one's presence to others.
可以用敲击发出的声音向别人表明自己的存在。
He knocked a big hole in the wall.
他把墙撞出了一个大洞。
I am so hurried as to knock into my teacher.
我如此匆忙以至于撞到老师身上。
The man is knock down by the bicycle.
这个男人被自行车撞倒了。
She knocked the bottom out of our argument.
她把我们的论点驳得体无完肤。
There was a knock at the window.
有人敲了一下窗户。
I heard footsteps, then a knock on the door.
我听到脚步声，随后是敲门的声音。
There was no answer to my knock, so I went away.
我敲门没人应，所以就走开了。
She took a bad knock when her husband died.
丈夫的死,使她受到沉重的打击。
When I fall, I get a terrible knock on the head.
我摔倒时头撞得很厉害。
五、词汇搭配
六、经典引文
The knock at the door startled Merdelius.
出自：M. WestShe..gave the prearranged knock on the door.
出自：R. IngallsHe took a bad ankle knock..and it is very swollen.
出自：Press Journal (Aberdeen)What's he that knocks as he would beat down the gate?
出自：Taming of Shrew,ShakespeareIf you knocked at every house You wouldn't find a man who could recognise a louse.
出自：M. BaldwinHe knocked on the inner door.
出自：D. AdamsHow tempted I would have been to yield, if opportunity had only knocked.
出自：fig.七、词语用法
knock的相关近义词
blame、censure、condemnation、criticism、defeat、failure、rejection、abuse、censure、condemn、criticise、slam
knock的相关反义词
knock的相关临近词
knocker、knob、Knocke、Knocksy、knockon、knockup、knockin、knock at、knockbal、knock on、knockoff、knock in