腐敗 ふはい分子 ぶんしではありませんでした
fuhaibunshidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 腐敗分子

1. Was not a corrupt element.; Was not a corrupting influence.; Was not a bad apple.

Past/Perfective
Negative
Polite
Formal Register