1. Aristoteles Senior Member

    Peru - español
    Good day forum pals;
    Is there someone who knows that expression or idiom:

    Some clinicians have a “rough rule of thumb" for prevention

    I will wait for any suggestions. Literally it would mean: "regla dura del pulgar".

    Thanks in advance.
     
  2. kidika

    kidika Senior Member

    Península Ibérica
    Castellano de Castilla
  3. isabel.eim

    isabel.eim Senior Member

    Caracas, Venezuela
    Spanish-Venezuela
    ¿Regla de oro establecida, tal vez?
     
  4. Aristoteles Senior Member

    Peru - español

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