litmus
英 [ˈlɪtməs]
美 [ˈlɪtməs]
词性
名词
基本解释
n.[化]石蕊
网络释义
a dye obtained from certain lichens, especially Roccella tinctoria, used as a blue indicator in chemical analysis and as a red coloring matter.\n一种从特定地衣中获得的染料，特别是岩血苔，用作化学分析中的蓝色指示剂和红色着色剂。
例证
1. Litmus paper is used to test the acidity or alkalinity of a substance.
(litmus paper用于测试物质的酸碱性。)
2. The litmus test for their friendship was whether they could trust each other with personal secrets.
(他们友谊的真正考验是彼此能否信任对方的个人秘密。)