洞穴入口
the opening that allows entry into a cave
洞穴的开口处
洞穴绘画
a painting made on the wall of a cave in prehistoric times
史前时代在洞穴墙壁上绘制的画作
洞穴艺术
prehistoric art found on the walls or ceilings of caves
在洞穴的墙壁或顶部发现的史前艺术
洞穴壁画
a drawing made on the wall of a cave in prehistoric times
史前时代在洞穴墙壁上绘制的图画
洞口
the opening of a cave, especially a large one
洞穴的开口，特别是大的开口
洞穴开口
a hole or gap that allows passage into a cave
允许进入洞穴的洞或缺口
洞顶
the rock that forms the top of a cave
构成洞穴顶部的岩石
洞穴顶部
the upper interior surface of a cave
洞穴的上部内表面
洞穴系统
a collection of caves that are interconnected
相互连接的洞穴集合
洞穴群
a large network of connected caves
一个由相连洞穴构成的大型网络
洞穴居住者
a person who lives in a cave, especially in prehistoric times
居住在洞穴中的人，尤指史前时代的人