維持 いじ可能 かのうセル速度 そくどじゃありません
ijikanō serusokudojārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 維持可能セル速度

1. It is not a maintainable speed.; It's not a speed that can be sustained.

Negative
Polite
Terminal Form
Computing