Phenanthridine is one of the important compounds in organic chemistry.

Phenanthrene is an important compound in organic chemistry.

There is a rumor of discord between them.

They are unfriendly brothers.

They are rumored to be in an unfriendly relationship.

In this experiment, we will investigate the structure of atoms using alpha rays.

He got seasick from the long boat trip.

He signs off after finishing his daily work.

I finished my work and signed off.

Lucifer is considered the most beautiful among the angels.