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Here the stream widens into a river.

溪水在这里变宽，成了一条河。

《牛津词典》

Discovering the inputs and outputs of rivers is a matter of measuring the discharges of every inflowing and outflowing stream and river.

发现河流的输入和输出，就是测量每一条流入和流出的河流的流量。

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When the snow melted that spring, every stream became an angry river that raced down the mountains tearing up trees and bringing destruction.

VOA: special.2009.06.06

Sabrina The Lady is only rescued once the attendant spirit -- calls on the nymph Sabrina, the genius loci -- the natural spirit of the Severn stream, which is the river that separates England from Wales.

只有随从号召美丽的少女,和一个天才的场所-,它是赛文河流的自然精神，是分割英格兰和威尔士的河流。

耶鲁公开课 - 弥尔顿课程节选

The simple mechanical pump draws water from a shallow well or nearby stream or river for use in irrigation.

VOA: standard.2009.12.18

East of the River Adur, the downs run in three long plateaux, separated by stream and river valleys.

BBC: England��s ghostly South Downs Way

Dip billycan into stream or river.

NEWYORKER: Diary of an Interesting Year

The young eels, called glass eels when they are at sea, are then carried by the Gulf Stream and reach river systems across Europe.

BBC: River ladders give eels a leg up