最長 さいちょう不倒 ふとう距離 きょりではありません
saichō futō kyoridewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 最長不倒距離

1. It is not the longest distance one can go without falling.; It isn't the furthest achievable distance.

Negative
Polite
Formal Register