Focus on the pronunciation of one-to-one
English definition of “one-to-one”
/ˌwʌntəˈwʌn/ adjective [before noun]
› used to describe the fact of one thing being worth the same as the second: The old banknotes were exchanged for the new at a one-to-one rate.
› (US one-on-one) MEETINGS involving only two people: one-to-one training a one-to-one meeting