It took many centuries to discover the mechanical power of steam!

发明蒸汽力是要好几千百年的时间呢！

Wind turbines convert the kinetic energy of the wind into mechanical power.

风力涡轮机将风能转化为机械能。

Because, that equation shows the rate at which energy is converted from electricity into another form of energy, such as heat, light, or mechanical power.

因为该方程代表了能量从电能转换为另一种形式的能量（例如热、光或机械力）的速率。

In your digestive system's mission to disassemble food into its tiniest, most basic molecular forms, the stretch that runs from your mouth to your stomach unleashes all of the mechanical and chemical powers at its disposal.

在你的消化系统将食物分解成最小、最基本的分子形式的任务中，从你的嘴到你的胃的伸展释放了它所能支配的所有机械和化学力量。

'Oh, papa, by that testing everything by the standard of wealth. When he spoke of the mechanical powers, he evidently looked upon them only as new ways of extending trade and making money.

‘哦，爸爸，用财富的标准来检验一切。当他谈到机械动力时，他显然只将它们视为扩大贸易和赚钱的新方式。

The work of domestic progress is done by masses of mechanical power — steam, electric, furnace, or other — which have to be controlled by a score or two of individuals who have shown capacity to manage it.

国内进步的工作是由大量的机械能——蒸汽、电、熔炉或其他——来完成的，这些机械能必须由一两个显示出管理能力的人来控制。