surface stress

例句：

1. 1. The surface stress on the material is critical for its performance.
   材料的表面应力对其性能至关重要。
2. 2. The researchers found that the surface stress could affect the stability of the material.
   研究人员发现，表面应力会影响材料的稳定。
3. 3. In order to improve the strength of the material, the surface stress needs to be reduced.
   为了提高材料强度，需要降低表面应力。