根据它的原理，我们通常用v表示,这里的V更代表速率而不是矢量，你能通过,对一个关于时间的位置向量求导得到它。
And, the way we can get it, so, it's called usually V, so, V here stands for velocity more than for vector. And, you just get it by taking the derivative of a position vector with respect to time.
您的代码应该在开启了垂直同步以及关闭缓冲的前提下、能够保持运行时帧速率等于或大于Rift头盔显示屏刷新率。
Your code should run at a frame rate equal to or greater than the Rift display refresh rate, v-synced and unbuffered.
金的填隙原子向硅扩散的速率比III族和v族杂质快几个数量级。
The interstitial atoms of gold diffuse into silicon at a rate several orders of magnitude faster than the group III and V impurities.
方法采用V-C水平扩散池，以透皮速率为指标，研究HST贴剂在离体人皮中的透过性。
Methods Using V-C diffusion cells, the permeability of HST from patch through the skin of human and SD rat was studied.
方法采用V-C水平扩散池，以透皮速率为指标，研究HST贴剂在离体人皮中的透过性。
Methods Using V-C diffusion cells, the permeability of HST from patch through the skin of human and SD rat was studied.
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