1·Litmus paper turns red in the presence of an acid.
石蕊试纸遇到酸就变红。
—— 《牛津词典》
2·In Dr Nersesian’s titration the litmus was a species called the brushtail possum.
涅尔谢相博士的滴定实验中的“石蕊指示剂”是一种叫帚尾袋貂的动物。
3·I wish there were some easy litmus test that I could just give you so you'd know which of you would be making a mistake taking this class.
我希望能有一种简单的石蕊测试，让我可以直接展示给你们并让你们知道，你们中的谁上这门课是一个错误。
4·Try taking this litmus test: The next time you are facing a snag of doubt, try going back to the first week you met, or an early moment where you felt something was off.
那就试着做这样一个“石蕊（一种指示剂）测试”吧：下一次你再有疑虑、踌躇不前的时候，不妨试试回到你们最初相遇的那一周，或者你最初察觉到不妥的那一刻。
5·In the form of a water solution or as litmus paper, it is the oldest and most-used indicator of whether a substance is an acid or a Base.
它的水溶液，或者做成石蕊纸后，是最古老和最常用的指示剂，可以指示一种物质是酸还是碱。