His words were a great encouragement to me.

Please store this medicine in a cool, dark place.

Observing manners is important in social life.

He is an expert in primatology and is engaged in the study of gorilla behavior.

This old radio uses a cold-cathode tube.

I have been to Salt Lake City.

A cooling device utilizing the principle of radiative cooling has been developed.

He is studying hard every day.

His behavior is a typical example of narcissism.

Ri is wearing black clothes.