把一小块明矾放入混沌的水中，我们发现，水很快就澄清了。
When we put asmall piece of alum into muddy water, we can see the alum can soonmake the water clear.
把一小块明矾放入混沌的水中，我们发现，水很快就澄清了。
When we put a small piece of alum into muddy water, we can see the alum can soon make the water clear.
采用硼酸和无水明矾及硫酸钾压块、焙烧、制备硼酸铝熔块。
Aluminium borate melting block was prepared by the combination of boric acid, anhydrous alum and potassium sulfate.
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