短語詞組短語valley valley floor 穀地valley -floor side strip 穀側(cè)陵削平臺glacial valley floor step 冰穀堦Reaching The Valley Floor 到穀底the valley floor 河穀平原aggraded valley floor [地質(zhì)]加積穀底;堆積穀底Valley Floor Loop 穀底小逕 返回 valley floor