所以他们知道中微子传播的距离，他们知道中微子花了多长的时间在路上，因此他们可以测量速度。

So they know the distance the neutrinos travel, they know how long it takes them, and they can therefore measure the speed.

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如果用频闪相机拍摄，苹果下落的过程，可以看到频闪的间隔，苹果的距离，随着时间不断变大，因为速度随着时间而变大。

So if I strobe this apple while it was falling I would see the separation, when it strobes to increase with time, because the velocity goes up with time.

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虽然保持最大速度的时间很短，但是这就能让狼长距离的保持追捕食物以及穿越难走的山路。

Although bursts of maximum speed are relatively short, wolves can maintain pursuit of running prey animals for long distances and over rough terrain.

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