white alum

• 白矾

white alum的用法和样例：

例句

1. Polyelectrolytes as coagulant aids lower the required dosages of alum and auxiliary chemicals.
   高分子电解质作为凝结剂援助更低白矾和辅助化学制品必需的剂量。
2. 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。
3. 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。