The sound was so quiet that I could hardly hear it.

The timbre of his voice is very beautiful.

He understands the importance of learning.

He is majoring in psychology.

Gaku is my best friend.

He has a deep interest in archaeology.

He is the intellectual leader of our team, always providing new ideas.

He is known as the supreme leader of that country.

He likes to take a walk in the park at dusk.

Orthoclase is a type of mineral, mainly found in granite.