fɔːɹ kəmpˈæɹɪsən, ɐn ɪlˈɪps hɐz ɐ kˈɑːnstənt sˈʌm ʌv fˈoʊkəl dˈɪstənsᵻz, ɐ haɪpˈɜːbələ hɐz ɐ kˈɑːnstənt dˈɪfɹəns ʌv fˈoʊkəl dˈɪstənsᵻz, ænd ɐ sˈɜːkəl hɐz ɐ kˈɑːnstənt ɹˈeɪʃɪˌoʊ ʌv fˈoʊkəl dˈɪstənsᵻz.
For comparison, an ellipse has a constant sum of focal distances, a hyperbola has a constant difference of focal distances, and a circle has a constant ratio of focal distances.