凸凸 tūtū biconvex Definitions Defs Origin Strokes Stroke Words Sentences Sents 凸凸 tūtū biconvex descriptive convex on both sides, especially relating to an optical lens Sources Definitions CC-CEDICT
凸凸 tūtū biconvex descriptive convex on both sides, especially relating to an optical lens Sources Definitions CC-CEDICT
