sand shallows and holms

例句：

1. 1. The beach iscovered in soft sand.
   海滩上铺满了柔软的沙子。
2. 2. The old house was builton a sandy beach.
   那座旧房子建在沙滩上。
3. 3. The children played inthe sandbox all day.
   孩子们整天都在沙坑里玩耍。