This text is missing some spaces, please add them: Inatwonumbercombination,it'sonlypossibletowinoncepercombination,meaningthatifthediceshowedthree,fiveandfiveyouwouldonlygetpaidonceforthecombination.
In a two number combination, it's only possible to win once per combination, meaning that if the dice showed three, five and five you would only get paid once for the combination.