surface of second order

例句：

1. 1. The surface of the wateris calm and clear.
   水面的表面平静而清澈。
2. 2. The scientist studied the surface of theocean to find out how it affects weather.
   科学家研究了海洋的表面，以了解它如何影响天气。
3. 3. The new car has asmooth surface that makes driving comfortable.
   这款新车有一个光滑的表面，使得驾驶舒适。