Definition
石蕊 has two unrelated meanings: it's a type of lichen (reindeer moss) that grows in cold regions, and it's also the chemical compound litmus used in litmus paper to test acidity. The chemical sense is more common in HSK-level contexts, but the biological sense appears in nature-related texts.
noun
litmus (chemical indicator used in acid-base tests)reindeer mossCladonia rangiferina (a type of lichen)
Examples
- 石蕊。shí ruǐ shìzhǐ kěyǐ yòng lái cèshì róngyè de suān-jiǎn xìng.Litmus paper can be used to test the acidity or alkalinity of a solution.
- ，石蕊。Zài Běijí dìqū, shí ruǐ shì xùnlù de zhǔyào shíwù zhī yī.In the Arctic region, reindeer moss is one of the main foods for reindeer.
- 石蕊。Huàxué shíyàn shì lǐ cháng yòng shí ruǐ lái jiǎncè wùzhì de xìngzhì.In chemistry labs, litmus is often used to test the properties of substances.
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