This crescent-shaped ridge of sand dune in Oman was formed by strong trade winds that form a smooth hill facing the wind (left) and concave slipface on the back.
阿曼一座新月形的沙丘脊由强信风吹成，在迎风的方向（图左侧）形成一面平缓的凸破，在背风面形成凹坡。
2
The reclamation sand can be directly used for facingsand.
获得的再生砂可直接用于面砂。
3
How will the market of zircon sand go in 2011? What will downstream firms do to share material profits and avoid risks, facing the continuing sharp rise in the price?