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凹透镜
凹透鏡
āotòujìng
1. concave lens

Character Breakdown

凹
āo
concave, hollow; depressed; pass, valley
HSK 6 5 丶
透
tòu
to pierce, to penetrate, to pass through; thorough
HSK 5 10 丶
镜
jìng
mirror, glass; lens, glasses
HSK 4 16 丶

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Category
Chinese