Please don't forget to hydrate to prevent heat stroke.

He clearly stated his opinion.

What are his thoughts?

His words have a deep meaning.

He knew that fact.

His wisdom is like a deep sea.

The prevention of venereal diseases is most important in safe sexual behavior.

He is suffering from agnosia due to brain damage.

The effect of this medicine is to alleviate the symptoms of a cold.

The train was full.