Read Edit View history 凸凸 tūtū biconvex Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 凸凸 tūtū biconvex descriptive · convex on both sides, especially relating to an optical lens 这是一个凸凸透镜。 Edit Delete References Add reference No references for this word.
凸凸 tūtū biconvex descriptive · convex on both sides, especially relating to an optical lens 这是一个凸凸透镜。 Edit Delete