impact surface

例句：

1. 1. The impact of the new policy on the economy is significant.
   新政策对经济的影响是显著的。
2. 2. The impact surface needs to be smooth and even for optimal performance.
   影响表面需要平滑且均匀，以获得最佳性能。
3. 3. The impact surface was tested using a variety of materials.
   影响表面通过使用多种材料进行了测试。