Alum
n. 明矾, 矾, 校友\\n[化] 明矾; 钾铝明矾
📖 牛津释义
alum
n[U]
white mineral salt used in medicine and in dyeing 明矾, 白矾（用於医药及染色）.
🗣️ 情景例句
Who?
谁呀？
Jeffrey was allowed to listen in on the committee's debate.
杰夫里被允许旁听委员会的讨论。
Those first words were to change my world.
我最先学会的这些单词改变了我的生活天地。