我会计算时间导数。
And so we're going to take the derivative versus time of this equation.
我们要求这个，方程的时间导数。
That's the first derivative of the position versus time.
它就是位置，对时间的一阶导数。
The second time derivative is the constant acceleration.
它的二阶导数就是这个恒加速度。
In this equation, the diffusion is a fractional order derivative of time and space.
在此方程中，弥散项和对时间的导数为分数阶导数所代替。
In this equation, the diffusion is a fractional order derivative of time and space.
在此方程中，弥散项和对时间的导数为分数阶导数所代替。
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