汇水盆地

例句：

1. 1. The floodplain is a natural basin that collects rainwater and helps to prevent flooding.
   冲积平原是一个自然盆地，收集雨水并有助于防止洪水。
2. 2. The river flows through the basin, carrying sediment downstream.
   河流流经盆地，携带沉积物下游。
3. 3. The basin is home to many rare plant species that are protected by conservation efforts.
   这个盆地是许多珍稀植物物种的家园，这些物种受到保护努力的保护。