sand mat

例句：

1. 1. The beach is littered with sand mats that provide a soft landing for swimmers.
   海滩上散布着沙垫，为游泳者提供了一个柔软的着陆点。
2. 2. The sand mats were used to protect the fragile coral reefs from the strong currents.
   沙垫被用来保护脆弱的珊瑚礁免受强流的影响。
3. 3. The sand mats are often used as a base for beach volleyball courts.
   沙垫通常用作沙滩排球场地的基础。