In other words, the effect of the Moon's gravitational force on Apollo8 became stronger than that of the Earth.
ɪn ˈʌðɚ wˈɜːdz, ðɪ ɪfˈɛkt ʌvðə mˈuːnz ɡɹˌævɪtˈeɪʃənəl fˈoːɹs ˌɔn ɐpˈɑːloʊ ˈeɪt bɪkˌeɪm stɹˈɔŋɡɚ ðɐn ðæt ʌvðɪ ˈɜːθ.