单词 | olefine |
释义 | Word Frequency olefine or olefin (ˈəʊlɪˌfiːn, -fɪn, ˈɒl-) noun other names for alkene Derived forms olefinic (ˌoleˈfinic) adjective Word origin C19: from French oléfiant, ultimately from Latin oleum oil + facere to make |
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