いっ はつ勝負 しょうぶじゃないです
i' hatsushōbujanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 一発勝負

1. It's not a one-shot deal.; It's not a do-or-die situation.; It's not all or nothing.

Negative
Polite
Casual Register