shifting sand

• 流砂

shifting sand的用法和样例：

例句

1. Sand under quick condition is often called quicksand.
   通常把快速流动的沙叫做流砂。
2. Reason for the formation of fly sand was discussed from the standpoint of physico-chemistry of silicate.
   从硅酸盐物理化学角度讨论飞砂的成因。