放射 ほうしゃ せん生物 せいぶつ がくじゃありませんでした
hōshasenseibutsuga kuja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 放射線生物学

1. Was not radiobiology.; Wasn't radiobiology.

Past/Perfective
Negative
Polite
Terminal Form