乔寇华在联大发言视频:请问 溶洞 用英语怎么说
来源:百度文库 编辑:查人人中国名人网 时间:2024/05/29 14:44:40
dissovle hole
Dissolve hole
water-eroded cave
limestone caves
karst caves
Cave with stalactites and stalagmites
dissovle hole
Dissolve hole
water-eroded cave
limestone caves
karst caves
Cave with stalactites and stalagmites