being, situated, or operating beneath the surface of the eartha subterranean bunker that supposedly could withstand even an atomic blast
a subterranean bunker that supposedly could withstand even an atomic blast
belowground, subsurface, underground
aboveground, surface
in 1603
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。