He is traveling around the world in search of the elixir of 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.

Today's temperature is 30 degrees.

This round shape represents a perfect circle.

Mausoleum visited the mausoleum where the ancient imperial family sleeps.

Nae is the oldest shrine in this region.