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

最显眼的是由八齿组成的齿动系统。

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.

完全内置于两或全部四车中，它们将扭矩（种扭转力）直接递到每车，避免了中央安装电机所使用的齿和动链带来的能量损耗。

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.

齿动系统中的大多数齿是由复合齿组成的，每复合齿包含两不同的齿，叠在另上面。

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.

发动机产生的动力必须通过离合器、齿和动轴才能使车转动, 然后排气系统必须处理废物。

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， 在下午， 你可以习齿动系统，然后深入了解振荡和经典力，接着习化并了解电池是如何储存能量的。

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的数字钟样。

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

在齿动系统的开始部分，驱动齿由电磁铁旋转，从而提供转动时钟指针的动力。