He is busy with work and hardly has time.

He is working by heavily using a computer.

This sentence is very long.

Fumiaki is my best friend.

It's a five-minute walk from my house to the nearest bus stop.

This sentence uses a lot of hiragana.

She goes to the beauty salon every month.

The doctor told him that his testosterone levels were high.

Esters are very important compounds in organic chemistry.

The sound quality of this stereo is wonderful.