sand washing

例句：

1. 1.The beach was so crowded that we couldn't even wash the sand.
   海滩上人太多了，我们连洗沙子都做不到。
2. 2.The car was washed by a professional mechanic.
   这辆车被一个专业的机械师洗过。
3. 3.After the rain, the streets were washed clean.
   雨后，街道变得干干净净。