Superfluidity is a part of physics, referring to the phenomenon where certain liquids flow without friction.

America is one of the superpowers in the world.

The theory of harmonic oscillators is a fundamental concept in physics.

My hometown is Fukuoka City, the prefectural capital of Fukuoka Prefecture.

I study Japanese every day using a workbook.

He wakes up early in the morning.

Choichiro went fishing.

Please stop deriding my dreams.

Her slender fingers are suitable for playing the piano.

He always says 'Silence is golden, speech is silver,' and believes in not talking unnecessarily.