ðɪs nˈʌmbɚ kæn ðˈɛn biː jˈuːzd tə kəmpˈɛɹ ɐ ɡˈɪvən hˈɔːɹsᵻz "spˈiːd" ɐɡˈɛnst ɪts kˌɑːmpətˈɪʃən ɪn ɐn ʌpkˈʌmɪŋ ɹˈeɪs, dᵻspˈaɪt ðə fˈækt ðætðə hˈɔːɹsᵻz hæv ˈɔːl ɹˈʌn ɪn dˈɪfɹənt ɹˈeɪsᵻz, æt dˈɪfɹənt tɹˈæks, ænd ɑːɹ dˈɪfɹənt kˈælɪbɚz ʌv hˈɔːɹsᵻz.
This number can then be used to compare a given horse's "speed" against its competition in an upcoming race, despite the fact that the horses have all run in different races, at different tracks, and are different calibers of horses.