S-surface

例句：

1. 1. The car's S-surface is smooth and shiny.
   这辆车的表面光滑且光亮。
2. 2. The scientist analyzed the chemical composition of the S-surface of the sample.
   科学家分析了样本的化学组成。
3. 3.The engineer designed a new S-surface for the aircraft to improve its performance.
   工程师为飞机设计了一种新的表面，以改善其性能。