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。
The car real driving cycle usually is a velocity-time curve based on times.
乘用车实际行驶工况通常可表示为基于时间的一段时间-速度曲线。
The curve of evapotranspiration is the typical unimodal sort, but for the difference with the amplitude , velocity , the size and time of the maximum evapotranspiration.
不同天气情况下,作物蒸发蒸腾量的日变化曲线基本相同,都是典型单峰型,变化的幅度、变化速率、峰值出现的时刻以及峰值的大小有差异。
That limit will be some arrow we can call the velocity at the time and it will always be tangent to the curve.
那个极限也就是一个矢量,我们称之为瞬时速度,并且它总是和轨迹相切的
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