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INTERMEDIATE LEVEL


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1945 洞 hang động . . .
dong4 cave; hole; zero (unambiguous spoken form when spelling out numbers); CL:个/个ge4 Lỗ



OXF3000ZH: 空的 空洞的 empty
OXF3000ZH: 孔眼 裂开处 hole
OXF3000ZH: 空的 空洞的 hollow













like: 洞

Höhle 洞穴 dòngxuè
Bunker 防空洞 fángkōngdòng