Take the difference of the two velocities and divide by the difference of the two times, and you've got the acceleration.

求出速度的差值,除以时间的差值,这样就能得到加速度

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This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.

这是起始时的速度,这是速度的增长速率,这是加速的时间

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Their difference divided by the difference in times is going to be the acceleration.

它们的差值再除以时间的差值,就是加速度

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But if you imagine making these measurements more and more and more quickly, in the end, you can measure what you can say is the acceleration now.

但如果你想越来越短的时间内,测量这些数据,最终,你会测量出你所说的现在的加速度

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The acceleration gives you an extra stuff, quadratic in time.

加速度对位移有额外贡献,是时间的二次项

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