音標發(fā)音英式音標 [??l.?m]美式音標 [??l.?m]英式發(fā)音 美式發(fā)音 基本解釋n.[化]白礬；明礬；校友(=alumnus/alumna)同根派生 alum相關詞英漢例句用作名詞 (n.)You can clarify the water by adding a little alum.你在水裡加一點明礬就能使水淨化。alum更多例句英英字典劍橋英英字典 a chemical substance containing aluminium used in dyeing (= changing the colour of something) and as an astringent (= substance that causes skin to tighten)alum劍橋字典alum柯林斯字典