surface strain

例句：

1. 1.The surface strain of the material is a critical factor in its strength.
   材料的表面应变是其强度的关键因素。
2. 2.The engineer analyzed the surface strain during the construction process.
   工程师分析了施工过程中的表面应变。
3. 3. The strain in the surface layer of the material is due to thermal expansion and contraction.
   材料表面层的应变是由于热膨胀和收缩引起的。