Amphibians are ectothermic (cold-blooded) vertebrates that do not maintain their body temperature through internal physiological processes.
æmfˈɪbiənz ɑːɹ ˌɛktəðˈɜːmɪk kˈoʊldblˈʌdᵻd vˈɜːɾɪbɹˌeɪts ðæt duːnˌɑːt meɪntˈeɪn ðɛɹ bˈɑːdi tˈɛmpɹɪtʃɚ θɹuː ɪntˈɜːnəl fˌɪzɪəlˈɑːdʒɪkəl pɹˈɑːsɛsᵻz.