短语词组短语cave chemical deposit 洞穴化学沉积物cave collapse deposit [地质]洞穴崩塌堆积cave biotic deposit [地质]洞穴生物堆积longtanshan cave deposit 龙潭山洞穴堆积cave deposit and fissure -filling sequence 洞穴积裂隙堆积 返回 cave deposit