sand wall

• 沙墙

sand wall的用法和样例：

例句

1. A pencil-like streamer of gas shoots out in both directions from the pillar and plows into surrounding gas like a fire hose hitting a wall of sand.
   一个铅笔状的气体流从柱体两端射出一头扎入周围的气体中，就像用消防水龙喷一堵沙墙。