a river or stream flowing into a larger river or lake
(河川或湖泊的)支流
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the Illinois River, a tributary of the Mississippi. 伊利诺伊河,密西西比河支流。
〈史〉 进贡者;附属国,进贡国
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tributaries of the Chinese empire. 中国封建王朝的附属国。
"late Middle English (in sense 2): from Latin