The Iwatobi Swim Club needs one more member before it can participate in relays.  Nagisa has set his sights on his classmate Rei, who is a member of the track team.  Despite Rei's refusal to join, but Nagisa appears intent on recruiting Rei into the swim club.
But you'll need at least four 
swimmers to bolster your case.
Aber ihr werdet mindestens vier Schwimmer brauchen, um eure Chancen zu erhöhen.
Pero necesitarían tener, por lo menos, 
cuatro miembros para hacer esa petición.
Pero entonces, necesitaríais 
un nadador más en el club.
Mais il vous faudra au moins 
quatre nageurs pour ça.
Ma se volete avere successo 
dovrete avere quattro membri.
Mas vocês precisarão de quatro nadadores
 para apoiar seu pedido.
Но вам нужно минимум четверо
пловцов для участия.