底冰

早乘车赴五大连池，抵达后午餐，游览老期火山熔岩洞：地下冰河：参观白雪世界，熔岩洞内欣赏霜花，冰雪雕，体验夏季里的冬天；冰洞（盛夏时节，地下熔岩洞欣赏冰晶奇观，冰雕，冰灯）；游览世界著名冷矿泉：长寿园（世界名泉、神泉旧址、弃石丢病、矿泉浴场、

ground state

seek common ground while putting aside differences

ground-glass stoppered flask

ground connection

ground ginger

ground bus

matrix (Sharp 1929); ground substance

ground state