tributary drainage area

例句：

1. 1. The river flows througha tributary area that isrich in minerals.
   这条河流流经一个富含矿物质的分水区。
2. 2. The tributary area is crucial for the survivalof the local fauna.
   分水区对当地生物的生存至关重要。
3. 3. Thetributary area ishome to many rare species ofplants and animals.
   分水区是许多稀有植物和动物的家园。