The launch of intercontinental ballistic missiles has become an international issue.

The intertransversarius muscle is an important part of our body, especially part of the back muscles.

He was working on that project round the clock.

Due to his somnambulism, he may walk around unconsciously in the middle of the night.

He is working round the clock.

Koiso-san is my best friend.

He came up with fifty ideas.

My father is fifty years old.

Gojushu is selling fresh fish again today.

The coexistence of humans and nature is important for the sustainability of the Earth.