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汉语拼音：chǐ lún

机器上有齿的轮状机件。通常是成对啮合，其中一个转动，另一个被带动。作用是改变传动方向、转动方向、转动速度、力矩等。

1. 有齿的轮状机件，是机器上最常用、最重要的零件之一。通常都是成对啮合，其中一个转动，另一个就被带动。用来改变传动方向、转动方向、转动速度、力矩等。也叫牙轮。亦用以比喻整个事业不可缺少的部分。

   秦牧 《艺海拾贝·核心》：“真正使我们的文艺成为整个无产阶级革命事业的齿轮和螺丝钉。”

• Neurological examination revealed that she had cogwheel rigidity and bradykinesia in her right upper and lower extremities.

  神经学检查发现，她已齿轮刚度和运动迟缓在她的右上肢和下肢。

• The Flowserve GR series, double-helical, herringbone type gear pumps have long been a workhorse of the general industry.

  长期以来，福斯GR系列人字齿型齿轮泵已成为一般工业的得力助手。

• In a luxury car, Mortdecai sighs that "the gears engaged in a way which reminded me of a warm spoon going in to a great deal of caviar. "

  在豪车中，Mortdecai感叹说，“齿轮印记提醒我从事于鱼子酱一样温暖的环境中去。”

• Therefore, gear variation is possible as regards the transmission ratio, ranging as far as a reversal of the direction of rotation.

  因此，变化是可能的齿轮传动比方面，包括作为旋转方向逆转远。

• Drastic jolting during lower gear acceleration is no longer present as well, leading to a stress-free, smooth driving experience.

  低齿轮加速期间剧烈的摇晃不再存在，导致了自由，驱动平稳。

• This cannot be achieved by an automatic transmission vehicle because there is no gear to tie a given road speed.

  这就不能实现自动变速器的车辆，因为没有齿轮系一个给定的道路的速度。

• They bent him over a gearbox and one of them held a Phillips screwdriver to his temple while they gave him the business.

  他们把安迪按在齿轮箱上，拿着螺丝起子对准他的太阳穴，逼他就范。

• In an introductory passage, he explains: "I was a cog in his machine for a certain period, one of many cogs, that and nothing more. "

  在导言中他如此解释道：“我只是某段时期内他机械装置上的一个齿轮，众多齿轮的其中一个，除此之外，别无其他。”

• Now, as you know, Russia is struggling to find its interpretation of democracy and also to get the economy in gear.

  正如你们所知道的，俄罗斯现在正在不断寻求自己的民主之路并以此推动经济齿轮向前发展。