contact discontinuity surface

例句：

1. 1.The contact discontinuity surface is crucial for the stability of the system.
   接触间断面对于系统的稳定性至关重要。
2. 2.During the experiment, the researchers observed a sudden change in the contact discontinuity surface.
   实验过程中，研究人员观察到接触间断面突然发生了变化。
3. 3. The engineer used a special tool to smooth the contact discontinuity surface, improving the performance of the machine.
   工程师使用一种特殊的工具来平滑接触间断面，从而提高了机器的性能。