His voice is very attractive.

Hoshi is the brightest star in the night sky.

He practices playing the guqin every day.

She is good at playing the koto.

Koto is my best friend.

He measured his weight using a scale.

In this park, smoking is strictly prohibited.

My energy is completely exhausted.

This rock is hard, and it's not easy to break.

He popped his shirt collar to look cool.