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单词 litmus paper
释义

litmus paper

English

Noun

litmus paper (countable and uncountable, plural litmus papers)

  1. (chemistry) paper containing a water-soluble pH indicator composed of a mixture of different dyes extracted from certain lichens. The resulting piece of paper is used to test materials for acidity, turning red when acidic and blue when alkaline.

Translations

Further reading

  • litmus paper on Wikipedia.Wikipedia
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