The axle connects to the outer arms of the Wheel, which begin to rotate at a speed of 1/8 of a revolution per minute.

车轴连接到这个车轮的外臂，外臂开始以每分钟1/8转的速度旋转。

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The mechanical detent with 100 positions per revolution permits precise and exact control of movement.

带有100个定位的机械止动装置，每一循环允许对运转有准确精密的控制。

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For anyone who doubts that the texting revolution is upon us, consider this: The average 13-to 17-year-old sends and receives 3,339 texts a month—more than 100 per day, according to the Nielsen Co.

如果有人对短信革命的到来表示怀疑，那就想想看：据尼尔森公司的数据，13至17岁的人平均每月收发3339条短信——每天超过100条。

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Since the beginning of the Industrial Revolution, energy consumption per person in the U.S. has crept ahead at 3% per year.

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Since the start of the industrial revolution, that concentration is now up to 390 parts per million.

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If the growth line continues downward you get right back to 0.2% per annum we had prior to the Industrial Revolution.

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