音标发音英式音标 [ˈæl.əm]美式音标 [ˈæl.əm]英式发音 美式发音 基本解释n.[化]白矾；明矾；校友(=alumnus/alumna)同根派生 alum相关词英汉例句用作名词 (n.)You can clarify the water by adding a little alum.你在水里加一点明矾就能使水净化。alum更多例句英英字典剑桥英英字典 a chemical substance containing aluminium used in dyeing (= changing the colour of something) and as an astringent (= substance that causes skin to tighten)alum剑桥字典alum柯林斯字典