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
That's the way.
就这样。
No, I don't think so.
不，我想不会。
The self-discipline required to drag myself out of bed eleven minutes earlier than usual was considerable.
这就要求我比平时早11分钟把自己从床上拽起来，这种自我约束是很艰苦的。