单词	dienophile
释义	dienophile noun di·​eno·​phile dīˈenəˌfīl plural -s : the olefinic or acetylenic component (such as maleic anhydride) that is seeking a diene in the Diels-Alder reaction Word History Etymology diene + -o- + -phile
随便看	hold a gun to someone's head hold a quiet conversation hold against hold all of the cards hold all of) the cards hold all the aces hold away hold back hold back (someone or something ) hold back one's tears hold back someone or something hold beam hold close to one's chest hold close to the vest hold court hold down hold down the fort hold everything hold firm hold forth hold good hold hands hold in hold in check hold in high regard

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