单词	Mannich reaction
释义	Mannich reaction noun Man·​nich reaction ˈmäniḵ- : the condensation typically of ammonia or a primary or secondary amine with formaldehyde and a ketone to form a beta-amino ketone Word History Etymology after Carl Mannich †1947 German chemist
随便看	knuckle joint knuckle line knuckle man knuckle pin knuckle post knuckle press knuckle sandwich knuckle under knuckle under (to) knuckle under to knuckle-dust knuckle-duster knuckle-joint press knuckle-kneed knuckleball knuckleballer knuckleballers knuckleballs knucklebone knucklebones knuckled knuckled down knuckled down (to) knuckled down to knuckled under

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