凹透镜 āotòujìng concave lens Definitions Defs Origin Strokes Stroke Words Sentences Sents 凹透镜 (凹透鏡) āotòujìng concave lens Frequency Written text 0.043 per million Sources Definitions CC-CEDICT Frequency data BCC Corpus (BLCU)
凹透镜 (凹透鏡) āotòujìng concave lens Frequency Written text 0.043 per million Sources Definitions CC-CEDICT Frequency data BCC Corpus (BLCU)
