Notice that the velocity changes here throughout time.
请注意，速度也一直，随着时间的改变而改变。
And so during the first second this is the velocity as a function of time.
因此在第一秒内,速度根据时间而变化。
And at time zero, when it is there, it has a velocity in that ellipse.
时间为0时，在轨道上有速度。
This is my time axis, and this is the velocity.
这是时间轴，这是速度。
Remember angular velocity is just the rate of the change of the angle over time.
角速度,是角度随时间改变的快慢。
That is the velocity at time zero, 0 and this is zero.
就是初始速度，而第二项是。
The slope of the time scale is related to the gas velocity.
特征反应时间随射流速度的变化斜率与燃气流量相关。
The successive velocity spectrum is easy to make, therefore it can save time and money.
它可以做到省时、快速、方便、成本低，而且便于实现显示彩色速度剖面。
ACCELERATION, The rate of change in velocity with respect to time.
加速度，随时间变化的速度改变率。
By acceleration is meant the rate of change of velocity with time.
加速度指的是速度随时间的变化率。
The rate of change of velocity with respect to time.
这样波浪感就会在加快速度时消失。
The interaction of temperature gradient with internal stress profile would result in time-varying velocity shift.
随时间变化的温度梯度与金属内部应力区的相互作用会导致超声速产生一种明显的变化。
The interaction of temperature gradient with internal stress profile would result in time-varying velocity shift.
随时间变化的温度梯度与金属内部应力区的相互作用会导致超声速产生一种明显的变化。
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