Even though earthquakes happen every day, an occurrence like the MadisonRiver landslide does not happen very often.
尽管地震每天都在发生,像麦迪生河滑坡似的事件却不是经常发生。
2
Hebgen dam, an earthfill structure with an unreinforced concrete corewall located on the madisonriver at its entrance to madison canyon.
赫布根坝是土筑的结构,在麦迪逊河进入麦迪逊峡谷处有一个无加固凝土的芯墙。
3
In one part of the upper reaches of the Madisonriver, 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.