生物 せいぶつ蓄積 ちくせきではありませんでした
seibutsuchikusekidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 生物蓄積

1. Was not bioaccumulation.; Did not accumulate biologically.

Past/Perfective
Negative
Polite
Formal Register