Isotopes can be constituted-of-or-filled-with uranium.Logical formLearned from64 sentences. Isotopes can be constituted-of-or-filled-with elements.Logical formLearned from64 sentences. Isotopes can be constituted-of-or-filled-with carbon.Logical formLearned from64 sentences. Medical isotopes may undergo a production.Logical formLearned from62 sentences. Isotopes can be known.Logical formLearned from61 sentences. An isotope may undergo concentration.Logical formLearned from60 sentences. Isotopes may undergo a production.Logical formLearned from60 sentences. An isotope can be fissionable.Logical formLearned from53 sentences. Isotopes can be long-lived.Logical formLearned from48 sentences. An isotope can be unstable.Logical formLearned from47 sentences. Isotopes can be environmental.Logical formLearned from45 sentences. Isotopes may undergo a separation.Logical formLearned from42 sentences. A shortage can be constituted-of-or-filled-with medical isotopes.Logical formLearned from39 sentences. Radioactive isotopes may undergo a use.Logical formLearned from38 sentences. (Carbon isotopes) can be stable.Logical formLearned from38 sentences.