That is the stuff that goes through my curve, in unit time,for a small portion of curve.

这就是在单位时间内，通过一小部分曲线的流体了。

youdao

Not only does the distance traveled in unit time remain the same but the direction does not change as well.

不仅单位时间内移动的距离不变，而且其方向也不改变。

youdao

If you were thinking of a velocity field, that would measure how much fluid is passing through the curve in unit time.

想象一个速度场，它能够度量，单位时间内流体的量。

youdao

He says the war-time unit helped break down racial barriers in the United States.

VOA: standard.2009.12.30

The unit for time will be a second, and time will be measured in seconds.

时间的单位是"秒",时间都是按秒来计的

耶鲁公开课 - 基础物理课程节选

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