tributary.

常见例句

The Avon is a tributary of the Severn.
埃文河是塞文河的支流。
The Missouri River is the chief tributary of the Mississippi.
密苏里河是密西西比河的主要支流。
There was a tributary road near the end of the village.
村的尽头有条岔道。
There was one street apart from a tributary road near the end of the village.
除了村子尽头的岔道外，还有一条大路。
Several rivers are tributary to the Ganges.
有好几条河都是恒河的支流。
This is a tributary of Zhujiang River.
这是珠江的一条支流。