实验结果表明：波垂直水面传播时，速度与时间平均方程的结果基本一致；
The results show that velocity agrees on the whole Wyllie equation as wave propagates perpendicularly to water surface;
及在换档时速度的变化。使我们更好的了解汽车在启动，刹车，制动，时速度与时间的变化。
And when shifts gear the speed change which gives us better understanding of automobile in starting, the braking, applying the brake, speed and time changing.
我们想知道食物与被污染的表面接触的时间长短是否会影响细菌转移到食物上的速度。
We wanted to know if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food.
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