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Jyutping bin3 sik1 geng3
Pinyin biàn sè jìng

Definitions (Wiktionary)
  1. noun
    photochromic glasses
    (syn.) 变色眼镜, 變色眼鏡
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)