I used an optical microscope for an experiment at school.

When I look into her eyes, it's like I can see her heart. That's because the eyes are the window to the soul.

He was born and raised in South Hamgyong.

He was born and raised in North Hamgyong.

The Yata no Kagami is a sacred mirror that appears in Japanese mythology.

He monitored the enemy's movements using a periscope.

He wrote a message using mirror writing.

There is a state-of-the-art electron microscope in my laboratory.

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

The stylohyoid muscle is part of the muscles of the head and has the role of lifting the hyoid bone.