noun 下载 🔗分享 石蕊， litmus试剂 A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels. Examples : "The science teacher used litmus paper to test if the liquid was an acid or a base, as the paper turned red in acids and blue in bases. " 这位科学老师用石蕊试纸来测试这种液体是酸性还是碱性，因为试纸在酸性液体中会变成红色，在碱性液体中会变成蓝色。 chemistry substance material color science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 石蕊，石蕊试纸 A simple test of acidity in a liquid using litmus, usually in the form of litmus paper. Examples : "The science student used litmus paper to check if the liquid was an acid. " 那位理科学生用石蕊试纸来检验这种液体是不是酸性的。 chemistry science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 石蕊试纸，试金石 A simple test of any attribute; a litmus test. Examples : "The ability to stay calm under pressure is a litmus test for success in this demanding job. " 在这种高压工作环境下，保持冷静的能力是衡量能否成功的试金石。 attitude quality 与AI对话词汇游戏阅读练习
