This is how the electric motor transforms electrical energy into mechanical energy.

就是电动机将电能转化为机械能的过程。

It's a fundamental principle regarding how generators, which change mechanical energy into electrical energy, operate.

是关于发电机如何将机械能转化为电能的基本原理。

That vibration converts sound energy to mechanical energy, which muffles the echo that gets back to the bats.

种振动将超声波的能量转化为机械能，从而减弱了传回蝙蝠的回声。

He was conducting experiments in 1821 on a device that changed electrical energy into mechanical energy.

他在1821进行实验，研究一种将电能转化为机械能的装置。

And he learned how to change that current into mechanical energy.

他会了如何将电流转化为机械能。

Ten years later, he discovered electromagnetic induction, a fundamental principle regarding how generators, which change mechanical energy into electrical energy, operate.

十后，他发现了电磁感应，是关于发电机如何将机械能转化为电能的基本原理。

DNA, bone, and silk all have this ability to turn mechanical energy into electrical.

DNA、骨骼和丝绸都具备将机械能转化为电能的特性。

" Power, " finally, can mean energy, especially electrical or mechanical energy.

“Power”最后，还可以指能量，尤其是电能或机械能。

The ball mill's mechanical energy turns the plastic into a fine powder.

球磨机的机械能将塑料研磨成细粉。

For the opposite transformation, converting mechanical energy to electrical, consider the lights that turn on when you clap.

至于相反的转换， 即把机械能转化为电能，想想那些在你鼓掌时就会亮起的灯。

That vibration converts sound energy to mechanical energy, which muffles the echo that gets back to the bats.

霍普金：那种振动将声能转化为机械能，从而减弱了返回蝙蝠的回声。

The competition will not require the machines to produce electrical power. He says changing the mechanical kinetic energy into electrical energy is easy.

场竞赛不需要机器来制造电力，他说将机械动能转化为电能很简单。

As we use our leg muscles to push the pedals, the mechanical energy generated is transferred to the bicycle.

当我们运用腿部肌肉去踩踏板时，产的机械能就被转移到了自行车上。

And piezoelectric devices may become even more common, since electricity is in high demand and mechanical energy is abundant.

随着电力需求的高涨和机械能的丰富，压电设备可能会变得更加普及。

Regarding electric currents and magnetic fields, Faraday conducted experiments in 1821 on a device that changed electrical energy into mechanical energy, eventually becoming the electric motor.

关于电流与磁场，法拉第于1821在一台将电能转化为机械能的装置上进行了实验，该装置最终演变为电动机。

But falling from a height of just two  meters has about the same mechanical energy as a bowling ball dropped from  a 7 story building.

但从两米的高度坠落所具有的机械能，大约相当于一个保龄球从七层楼高处落下时的能量。

Motors take electrical energy – so, the current running through a coil of wire – and convert it into mechanical energy as the motor turns.

电机吸收电能——即流过线圈的电流——并在电机转动时将其转换为机械能。

Our heart would use up less mechanical energy by reducing our pulse rate (the speed it pumps) and reducing blood pressure (the force it pumps).

我们的心脏会通过降低心率（泵血的速度）和降低血压（泵血的力量）来减少机械能的消耗。

In quadrupeds, like the tiger, their tricep and shoulder muscles contract in a long gait in a special way that absorbs the mechanical energy and disperses it as harmless heat.

偶足类动物，例如老虎，它们的三头肌和肩部肌肉长时间以一种特殊的方式收缩，以此来吸收机械能并将其分散为无害的热量。

The amazing thing about your complicated, self-healing, blood-guzzling muscle tissues is that they turn chemical potential energy into mechanical energy, or movement, simply by doing two things — contracting and relaxing.

你复杂的，自愈的，耗血的肌肉组织的神奇之处在于它们将化势能转化为机械能，或运动，仅仅通过做两件事情——收缩和放松。