短语词组短语mud -rock flow-prone area 泥石流易发区mud and rock flow 泥石流underground mud -rock flow 井下泥石流dump mud -rock flow 排土场泥石流glacial mud -rock flow 冰川泥石流volcanic mud -rock flow 火山泥石流treatment of mud -rock flow 泥石流处理 返回 mud rock flow