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alum

美['æləm] 英['æləm]

n. [化]白矾；明矾；<口>校友(=alumnus/alumna)

近义词：alumnus，alumna，graduate，ammoniaalum，potassiumalum，ammoniumalum，grad，potashalum，

Noun

a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
a person who has received a degree from a school (high school or college or university)
a double sulphate of aluminum and potassium that is used as an astringent (among other things)

用作名词(n.)

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