potash alum

英 美
  • (铝)钾矾,(钾)明矾
  • alum n.[化]白矾;明矾;校友(=alumnus/alumna)
  • potash n.钾碱;草碱;碳酸钾
Noun:
  1. a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

    1. You can clarify the water by adding a little alum.
      你在水里加一点明矾就能使水净化。
    2. But chemical mordants such as alum are popular today.
      但化学腐蚀剂如明矾今天已经十分普遍。

【邻近词汇】