And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.

因此，我们可以用星星的自转速度及速率作为衡量它们年龄的计时器。

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Since Earth’s rotation rate varies, so would the value of one second when it’s defined as a fraction of the time it takes for one spin of the Earth on its axis.

由于地球自转速率发生偏离，因此当把地球绕中轴旋转一圈作为一个单位时，（这种偏离）就相当于一秒钟时间。

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Due to the earth's rotation, hurricanes spin counterclockwise north of the equator and clockwise south of it.

由于地球的自转，赤道以北的飓风是逆时针旋转的，赤道以南则是顺时针。

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When we have just a single bond in them molecule, you have all the free rotation you want, you can just spin it around, there's nothing keeping it in place.

当我们在分子力只有一个单键时，你可以随意旋转，你可以让它转起来，没有什么东西能固定住它。

麻省理工公开课 - 化学原理课程节选

There are so few air particles to create drag that a slow rotation can quickly accelerate into an uncontrollable spin.

FORBES: Watch Felix Baumgartner's First-Person View Of His Death Spin