late 14c., "whitish mineral salt used as an astringent, dye, etc.," from Old French alum, from Latin alumen "alum," literally "bitter salt," cognate with Greek aludoimos "bitter" and perhaps with English ale.
实用例句
1. Alum will settle turbid water.
明矾可以澄清浊水.
来自《现代汉英综合大词典》
2. Add the alum slowly to the cup of hot water.
给这杯热水添加缓慢的明矾.
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3. But chemical mordents mordants such as allon alum are popular today.
但是化学腐蚀剂例如明矾现在很流行.
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4. The doors are made laminated panel and G shape alum . handle.
橱柜门板选用进口防火板和铝合金封边拉手精工制作而成.
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5. It has triumphantly used in measuring alum images system in waterworks.