1. But chemical mordants such as alum are popular today. 但是化学媒染剂例如明矾现在也很常见。
2. Broken material for coal, salt, BaiYa, gypsum, alum, brick and tile, limestone, etc. 被破碎物料为煤、盐、白亚、石膏、明矾、砖、瓦、石灰石等。
3. This paper introduces the features of Shanxi alum clay, analyzes its exploitation and using actuality, and puts forward relevant suggestions on the problems existed. 介绍了山西铝土矿资源特征，分析了山西铝土矿资源开发利用的现状，并针对存在的问题，提出了相关的建议。
英英解释
n.
1. a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
2. a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
3. a person who has received a degree from a school (high school or college or university)
4. a double sulphate of aluminum and potassium that is used as an astringent (among other things)
