外因 がいいん損失 そんしつ時間 じかんではありません
gaiinsonshitsu jikandewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 外因損失時間

1. It is not an external factor lost time.; It wasn't due to external causes/factors.

Negative
Polite
Formal Register
Computing