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单词	acetonylidene
释义	acetonylidene noun ac·​e·​ton·​yl·​i·​dene ˌa-sə-tō-ˈni-lə-ˌdēn, ə-ˌse-tə- plural -s : the bivalent radical CH3COCH< formed by removal of two hydrogen atoms from the same carbon atom of acetone Word History Etymology acetonyl + -idene First Known Use 1919, in the meaning defined above
随便看	disquietudes disquisition disquisitional disquisitions disquisitive disquisitor Disraeli disrank disrate disrated disrates disrating disregard disregardant disregarded disregarders disregardful disregardfulnesses disregarding disregards disrelate disrelated disrelation disrelations disrelish

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