River gravel

River gravel is a name given to gravel composed of small pieces of rounded stone of various colors, usually no larger than a large coin. It is named for the effect of many years of rounding of the edges of the stones due to a flow of water over it, as often takes place in a river. River gravel is often used in outdoor settings, such as a park walkway.

单词	River gravel
释义	River gravel 原声例句加州的群山（下） The ride from Murphy's to the cave is scarcely two hours long, but we lingered among quartz-ledges and banks of dead river gravel until long after noon. 从墨菲家到洞穴的车程不到两个小时，但我们在石英壁架和死河砾石河岸之间徘徊，直到中午过后很久。英语百科 River gravel River gravel is a name given to gravel composed of small pieces of rounded stone of various colors, usually no larger than a large coin. It is named for the effect of many years of rounding of the edges of the stones due to a flow of water over it, as often takes place in a river. River gravel is often used in outdoor settings, such as a park walkway.
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