surface adhering sand

• 梁

surface adhering sand的用法和样例：

例句

1. This plane is therefore called the neutral surface of the beam.
   因此这个平面称为梁的中性面。
2. OWING to the cant of the vessel, the masts hung far out over the water, and from my perch on the cross-trees I had nothing below me but the surface of the bay.
   由于船已经倾斜，桅杆远远地伸到了水面上，我坐着的桁梁上面只有一湾海水。