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Jyutping ding1 hei1
Pinyin dīng xī

Definitions (CC-CEDICT)
  1. butene or butylene C4H8
Definitions (Wiktionary)
  1. noun
    butene
Examples (Wiktionary)
  1. Mandarin
    反-2-丁烯
    反-2-丁烯
    fǎn - èr - dīng xī
    • trans-2-butene