momentum gradient

例句：

1. 1. The acceleration of the vehicle is directly related to its momentum gradient.
   车辆的加速度与动量梯度直接相关。
2. 2. The study of the momentum gradient is crucial for understanding the dynamics of fluid flow.
   研究动量梯度对于理解流体流动的动力学至关重要。
3. 3. In this experiment, we measured the momentum gradient between two points on the surface of the liquid.
   在这个实验中，我们测量了液体表面两点之间的动量梯度。