单词	ethene
释义	ethene /ˈɛθiːn / noun Systematic chemical name for ethylene.For example reduction of ethanol gives the alkene ethene.... The alkene ethene can be produced by heating ethanol with (for example) aluminum oxide. Polymerization of ethene gives polythene (polyethylene). Origin Mid 19th century: from ether + -ene.
随便看	optimalization optimally optimate optime optimific optimisation optimise optimism optimist optimistic optimistical optimistically optimity optimization optimize optimizer optimum optimé opt in opting-in opting-out option optionaire optional optional clause

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