In one part of the upper reaches of the Madison River,a whole mountain began shifting,then came crashing down to fill the deep valley and dam the great river with millions of tons rock and trees.是什么意思_In one part of the upper reaches of the Madison River,a whole mountain began shifting,then came crashing down to fill the deep valley and dam the great river with millions of tons rock and trees.在線翻譯_英語_讀音_用法_例句