The most recognizable is the gear train made from eight gears.

最显眼是由八个齿轮组成齿轮传动系统。

At the beginning of the gear train, a driver gear is rotated by an electromagnet, which provides the force to rotate the clock hands.

在齿轮传动系统开始部分，一个驱动齿轮由电磁铁旋，从而动时钟指针动力。

Most of the gears in the gear train are composed of compound gears, each of which has two different gears, one on top of the other.

齿轮传动系统中大多数齿轮是由复合齿轮组成，每个复合齿轮个不同齿轮，一个叠在另一个上面。

For example, in a single afternoon you can learn about gear trains, then dive into oscillations and classical mechanics, followed by chemistry and understanding how batteries store energy.

例如， 在一个下午， 你可以学习齿轮传动系统，然后深入了解振荡和经典力学，接着学习化学并了解电池是如何储存能量。

Now that we've covered the gear train, Let's dive into the quartz crystal oscillator and see what makes this clock nearly identical to the digital clock in your computer.

现在我们已经讲过了齿轮传动系统，让我们来看看石英晶体振荡器， 看看是什么让它几乎与你电脑里数字钟一样。

The oomph produced by the engine must then be passed through clutches, gears, and driveshafts to make the wheels turn, and then exhaust systems have to deal with the waste.

发动机产生动力必须通过离合器、齿轮和传动轴才能使车轮动, 然后排气系统必须处理废物。

Fully contained within either two or all four wheels, they deliver torque (a twisting force) directly to each wheel, avoiding the energy losses associated with the gears and transmission links used by centrally mounted motors.

完全内置于个或全部四个车轮中，它们将扭矩（一种扭力）直接传递到每个车轮，避免了中央安装电机所使用齿轮和传动链带来能量损耗。