生物 せいぶつ濃縮 のうしゅくじゃなかったです
seibutsunōshukujanakattadesu

Noun
Desu Copula

The polite, past negative form of 生物濃縮

1. Wasn't bioaccumulation.; Wasn't biological concentration.

Past/Perfective
Negative
Polite
Casual Register