Koushun is my best friend.

I make it a point to drink mineral water every day.

My favorite fruit is Kosui pear.

I was fascinated by the beauty of the Yangtze water.

Visible light is the range of light visible to the human eye.

He is attending a prep school for university entrance exams.

Gojoseon was the oldest dynasty in East Asia.

He used to work as a miner when he was young.

He looked out over the wilderness and felt a sense of freedom and vastness.

We launched a large-scale advertising campaign to disseminate information about the new product.