Upgrading it to give the exact latitude and longitude of the collision wasn’t simple work, since Chesley had to factor in the spin, orientation and rotational wobble of the Earth at each moment.

要知道软件升级到可以预测撞击的确切经纬度绝非易事，因为切斯利每次都要将地球自传，方向及旋转轴等因素考虑在内。

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How hard it is to spin something, on the other hand, is given by its moment of inertia.

旋转东西有多难，换着来讲的话，是跟转动惯量有关的。

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I soon saw that this new equation gave correctly the spin and the magnetic moment of the electron.

我马上发现这个新方程正确地给出了电子的自旋和磁矩。

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With a little help, you can generally return the ball 40 yards on each kick, assuming you run, spin and jump at the exact right moment.

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The biggest moment of drama came when the Austrian went into a spin as he hurtled towards the ground, turning at a maximum rate of 60 revolutions per minute.

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But the best spin in the world can not put a gloss on the most pressing problem facing the government at the moment, which is how to increase lending.

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