His thought is deep.

Caseous necrosis was found in his lungs.

He committed another crime while on probation.

He is reading a book about historical northern Korea.

This old radio uses a triode.

Homo erectus played a significant role in the process of human evolution.

Protectionist policies are introduced to protect domestic industries from foreign competition.

A song praising his courage was playing.

He assisted my project.

He couldn't refrain from the spiciness.