surface complexes

例句：

1. 1.The surface of the ocean is covered in an underwater forest.
   海洋的表面覆盖着水下森林。
2. 2.The surface of the lake is calm and clear.
   湖面平静而清澈。
3. 3.The surface of the ice is covered with frost.
   冰的表面覆盖着霜。