s. (of a stream) flowing into a larger stream
s. paying tribute
a. 支流的, 纳贡的, 从属的, 辅助的
n. 支流, 纳贡者, 属国
1. The river has many tributaries that help to increase its water flow.
这条河有许多支流，帮助增加水流量。
2. We followed a small tributary to find a good fishing spot.
我们沿着一条小支流寻找一个好的钓鱼地点。
3. Many animals rely on tributaries for their drinking water.
许多动物依赖支流获取饮水。