The kids were playing by the river and one of them fell in.

孩子们在河边玩耍时，其中一个突然落水了。

《牛津词典》

Two crocodile farm workers in northern Australia were collecting crocodile eggs by a river bank when a crocodile grabbed one of them by the arm.

澳大利亚北部的两个鳄鱼农场工人在河岸边捡拾鳄鱼蛋，一不小心，一个工人被鳄鱼咬住了胳膊。

youdao

A river would not be one and the same river were it not for the fact that the water fowling in it is always changing, as are the river Banks and even the course of the river.

一条河流不会永远是这一条河流，不仅仅是因为它的河水总是不断变化，甚至河源和河道都在不断改变着。

youdao

The flood defences, completed in June, were meant reduce to the likelihood of flooding from the River Caen from a one-in-20 chance of occurring in a particular year to one-in-100.

BBC: Braunton 'needs more flooding solutions'

The reactions of people they encountered were mixed but no one in Africa believed the white man had come just to find the source of a river.

ECONOMIST: African exploration