短語詞組短語glacial boulder valley debris 冰川穀巖屑glacial boulder valley 冰蝕穀glacial carved valley 冰蝕穀glacial hanging valley 冰蝕懸穀;冰成懸穀glacial valley floor step 冰穀堦hanging glacial valley 懸冰川穀glacial boulder carved valley 冰蝕穀glacial boulder hanging valley 冰蝕懸穀glacial valley lake 冰蝕穀湖;冰穀湖 返回 glacial valley