"biconvex" Chinese-English Dictionary

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Chinese Pinyin Translation Actions
凸凸 tū tū convex on both sides (of lens) / biconvex
双凸面 雙凸面 shuāng tū miàn convex on both sides (of lens) / biconvex
The four tones The four tones of Mandarin Pitch over time: tone 1 high and level (red), tone 2 rising (orange), tone 3 falling then rising (green), tone 4 falling (blue). tone 1 tone 2 tone 3 tone 4 Time Pitch

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