Cavern/GRE/Lanbao

GRE蓝宝

Noun

• 大洞,洞窟 (one cave of large or indefinite extent)
  • (类)
    • cavern·spelunker＝s tar·astronomer 洞穴· 探洞者=星·天文学家( 后研究前)
  • (同)
    • cave, grotto, subterranean (记) 来自cave

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