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请叫我大王哦
Dissolve hole
让雪飞CXF
limestone caveskarst caves
大力宇哥
Cave with stalactites and stalagmites
阿tin逐梦游
溶洞 [词典] [地质] karst cave; [例句]桂林有溶洞。There are karst caves in Guilin.
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