动词敲；撞；击；打名词撞击；敲击；敲击声；敲门（或窗等）声网络敲打；爆震
及物动词
1. What knocks me is his impudence.
他的厚颜无耻使我感到吃惊。
2. knock
2. I knocked over the glass and spit the water.
我打翻了杯子，水洒了。
不及物动词
1. His legs knocked against the chair.
他的两条腿撞到了椅子。
名词
1. When I fell I got a terrible knock on the head.
我摔倒时头撞得很厉害。
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的翻译
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.
1. 敲；击
If you knock on something such as a door or window, you hit it, usually several times, to attract someone's attention.
e.g. She went directly to Simon's apartment and knocked on the door...
她直奔西蒙的房间，敲了敲门。
e.g. Knock at my window at eight o'clock and I'll be ready...
8点钟敲我的窗，我会准备好的。
1. 敲；击
If you knock on something such as a door or window, you hit it, usually several times, to attract someone's attention.
e.g. She went directly to Simon's apartment and knocked on the door...
她直奔西蒙的房间，敲了敲门。
e.g. Knock at my window at eight o'clock and I'll be ready...
8点钟敲我的窗，我会准备好的。
Tootacke-(牙痛)
A：Oh!!! I have a horrible toothache.
哦，我的牙痛死了。
B：You should go to the dentist.
你该去看看牙医。
A：I hate dentists.
我讨厌看牙医。
B：Well, suffer then. If you have a toothache, you have to go to the dentist.
那么，你就忍着吧。如果你牙痛，你应该去看牙医的。
A：It always hurts. I hate going.
它老是痛个不停，我讨厌去（看牙医）。
B：Stop being such a baby. If it really hurts that much, just let them knock you out.
别象个小孩子似的。如果牙真的那么痛的话，就让医生治疗。
A：O.K., O.K., I’ll go.
好了好了，我会去的。
B：Good. You feel better after you do.
那才好。去了之后你会觉得好受一些的。