常用 じょうよう薄明 はくめいではありませんでした
jōyōhakumeidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 常用薄明

1. Was not commonly thin/dim.; Was not frequently used in low light.

Past/Perfective
Negative
Polite
Formal Register
Astronomy