什么是 tributary？ tributary是afluent
什么是 afluent？
- Making additions or yielding supplies; contributory.
Fer addicions o produir subministraments; Contributiva.
- Paid in tribute.
Pagat en tribut.
- Paying tribute: a tributary colony.
- A stream that flows into a larger stream or other body of water.
- A ruler or nation that pays tribute.