He has a strong ambition and is always seeking self-improvement.

This factory strictly controls the emission of hydrogen sulphide.

I saw a Hachijō blue rock thrush on Hachijō Island.

He turned fifty-six years old.

Isoroku is my best friend and a very kind person.

Tsuyoshi is a very strong person.

On Monday night, I was gazing at the moon while reading an old poem.

Strong interaction is one of the four fundamental forces in particle physics.

It's difficult to calculate the area of this hexagon.

The styloglossus muscle plays a role in raising and pulling the tongue back.