Saki doesn't understand why she was taken to play mahjong but that's where Saki and Nodoka met. Nodoka wins but questions Saki's playing style so she asks for another game.
To get plus-minus zero every time...
...الحصول على صفر زائد-ناقص في كلّ مرّة
Conseguir más-menos cero cada vez...
de faire zéro 
à chaque fois…
fare sempre +/- 0.
Conseguir zero todas as vezes...