normal velocity surface

例句：

1. 1.The researchers found that the normal velocity surface of the material is crucial for its performance.
   研究人员发现，该材料的正常速度表面对其性能至关重要。
2. 2. The team used a special technique to measure the normal velocity surface of the object.
   团队使用了一种特殊技术来测量物体的正常速度表面。
3. 3. The study revealed that the normal velocity surface plays a significant role in the dynamics of the system.
   研究显示，正常速度表面在系统动力学中起着重要作用。