Tributary
01
支流, 附属河流
a watercourse that flows into a larger river or body of water
例子
The Volga River, Europe 's longest river, is sustained by tributaries like the Kama and the Oka, forming an extensive network throughout Russia.
伏尔加河是欧洲最长的河流，由卡马河和奥卡河等支流维持，形成了遍布俄罗斯的广泛网络。
tributary
01
helping cause something
例子
Several factors were tributary to the company's financial collapse.
02
paying tribute or owing allegiance to a more powerful state or ruler
例子
The kingdom remained tributary to the empire for over a century.
03
(of a river or stream) flowing into a larger body of water
例子
Numerous small streams are tributary to the main river.
