- 大: big; large
- 防空洞: air-raid shelter; bomb shelt ...
- 防空洞: 1.(防空袭的洞) air-raid shelter; bomb shelter; bomb shelter; bombproof dugout; abri2.(掩护坏人的场所) a hideout for evildoers3.(掩护坏思想的事物) a cover for wrong thoughts
- 地下防空洞: buried shelter; underground air raid shelter; underground shelter
- 防空洞门: bomb shelter door
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