These shoes have a double sole and are very durable.

The ecosystem of zoobenthos is an important field of study in marine biology.

The study of benthos is an important field in marine biology.

Phytobenthos is an important part of the marine ecosystem.

He started a special exercise to strengthen his plantaris muscle.

He is a frog in a well, not understanding how vast the world is.

My name is Yasokawa.

Yesterday, I checked the location of the Edogawa on an old map.

The Shatt al-Arab is located between Iraq and Iran.

We visited the ancient dolmen.