But for the continuous jet which velocity gradient is not linear, it has not only one virtual origin.

但对于非线性速度分布的连续射流，存在的虚拟原点不是唯一的。

The effects of the velocity gradient and wall-proximity on the measuring errors are related to the flow direction.

近壁对总压测量影响不大。速度梯度和近壁对测量误差的影响还与来流方向有关。

The sound field of normal modes in the. shallow-water having negative velocity gradient and rough interface are calculated using such results.

文中用其结果计算了具有粗糙界面的负声速梯度浅海中的简正波声场。

Velocity gradient, pressure gradient and circulation gradient are used to model the separated vortex flow field over a leading edge delta wing.

用速度梯度、压力梯度和环量梯度模拟大攻角尖前缘三角翼流场。

The first, how to sort out data coming from experiments by the theory of boundary velocity gradient; Secondly, how to apply the data in practice.

在实践中应用该理论涉及到两个问题：一是如何将实验测得的数据整理成边界极限速度梯度，二是如何利用边界极限速度梯度反过来指导实践。