sand grain

• 砂粒,泥沙颗粒

sand grain的用法和样例：

例句

1. The sand is separated from the silt and clay by wave sorting.
   砂粒在波浪分选作用下从粉砂及粘土中分出。
2. We can imagine a seismic detector being bombarded by myriads of grains of sand.
   我们可以想像检波器受几万个砂粒冲击的情景。