concentrate on concentrate on /ˈkɒnsəntreɪt ɒn/

verb

1. () Center upon  ( centre on [Canadian, British] , revolve about , revolve around , center [American] , center on [American] , concentrate on , focus on )
   center upon
    Her entire attention centered on her children
   Her entire attention centered on her children
    Our day revolved around our work
   Our day revolved around our work