You can use spectroscopy to examine the components of a substance.

I like reading uncle's composition.

After finishing reading the official documents, he thought deeply.

There is a small branch school in my town.

This spectrum is very beautiful.

This machine is used to divide light into a spectrum.

This structure is very complex.

All his actions are spontaneous.

Takaji-san is my best friend.

He is acting with self-consciousness.