壊変 かいへん毎秒 まいびょうじゃなかったです
kaie mmai byōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 壊変毎秒

1. Wasn't decaying per second.; Wasn't deteriorating every second.

Past/Perfective
Negative
Polite
Casual Register
Physics