対流 たいりゅう けん界面 かいめんじゃありませんでした
tairyūkenkaimenjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 対流圏界面

1. Was not the tropopause.; Was not the boundary between the troposphere and stratosphere.

Past/Perfective
Negative
Polite
Terminal Form