(Carbon isotopes) may undergo analyes.Logical formLearned from3 sentences. Isotopes may have numbers of neutrons.Logical formLearned from3 sentences. A radioactive isotope may undergo an injection.Logical formLearned from3 sentences. Studies of isotopes may reveal a record of variations.Logical formLearned from3 sentences. Stable isotopes can be constituted-of-or-filled-with water.Logical formLearned from3 sentences. (Isotope ratios) may undergo a measurement.Logical formLearned from3 sentences. A radioactive isotope may be injected.Logical formLearned from3 sentences. A range can be constituted-of-or-filled-with stable isotopes.Logical formLearned from3 sentences. A stable isotope can be constituted-of-or-filled-with carbon.Logical formLearned from3 sentences. Isotope may be used.Logical formLearned from3 sentences. Topics may include isotopes.Logical formLearned from3 sentences. An isotope can be abundant.Logical formLearned from3 sentences. A need can be for medical isotopes.Logical formLearned from3 sentences. Isotopes can be for example.Logical formLearned from3 sentences. (Drinking tea) may be laced with a lethal dose of a (radioactive isotope).Logical formLearned from3 sentences.