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
There are thirty-three thousand three hundred and thirty-three feathers on that bird's throat.
那只画眉鸟的喉咙上有三万三千三百三十片羽毛。
I couldn't get through.
我打不通电话。
A good knowledge of English will improve your chances of employment.
英语好将有助于增加你们的就业机会。