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alkene

noun
/ˈælkiːn/
/ˈælkiːn/
(chemistry化学)
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  1. any of a series of gases that contain hydrogen and carbon and that have a double bond (= force of attraction) between two of the atoms of carbon烯;烯烃
    Word Originlate 19th cent.: from alkyl (German, from Alkohol ‘alcohol’ + -yl) + -ene.

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