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litmus

/lit-muhs/US // ˈlɪt məs //UK // (ˈlɪtməs) //

石蕊,文石,石蕊的作用

Definitions

n.名词 noun
  1. 1
    • : a blue coloring matter obtained from certain lichens, especially Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator.

Examples

  • Aaronson figured it would be much easier to solve the system minus one of the 11 rules—leaving a “Collatz-like” system, a litmus test for the larger goal.

  • Such litmus tests have not applied in Democratic races this year.

  • Cohorts identify these user traits without compromising the user’s privacy, passing a critical litmus test for any viable targeting or measurement solution as programmatic marketing moves toward the post-cookie era.

  • The problem with this particular litmus test is, it’s not about policy and it’s anti-democratic.

  • So, over the years, we’ve seen the GOP grow more conservative, in part perhaps due to these litmus tests.

  • Again, that pre-communion questionnaire sin litmus test might prove handy.

  • Applying an ideological litmus test for commencement speakers is not a good idea.

  • But when did they become the litmus test of competence in office?

  • So they are a litmus paper for wider fertility—not a significant driver of Israeli birthrates.

  • Opposition to the Affordable Care Act in toto might linger as a litmus test for conservatives.

  • The solution of lead must contain acid; and if by keeping it does not change litmus-paper, acid must be added till it does.

  • The blue litmus paper became red showing the presence of an acid.

  • When the small residue was completely dry, it was a yellow solid soluble in dilute alcohol and acid to litmus.

  • Vapors and liquid were given off, both of which turned red litmus blue and had a strong odor like tobacco smoke.

  • This is an indicator for bases and acids, like litmus, but it is less sensitive to hydroxide-ion than is litmus.