I do laundry using synthetic detergent.

I learned Pythagoras' theorem at school.

He participated in the Olympics as a pentathlon athlete.

Pentathlon is a competition that tests both physical strength and technique.

The seasoned egg in this ramen is delicious, isn't it?

Tierra del Fuego is located at the southernmost tip of South America.

Once you're ready, let's go!

The development of fusion reactors could potentially be the key to solving future energy problems.

The Kokin Wakashū is the second collection of the Chokusen Wakashū.

The prime meridian is the line that serves as a reference for determining the longitude of any point on Earth.