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

This lens is used for light concentration.

This lens is used to concentrate light.

He was hit hard in the solar plexus during the boxing match.

The heliocentric theory is the idea that the sun, not the earth, is the center of the universe.

That man-child is still living in his parents' house.

He is called a 'kid's room uncle', and is alienated from society.

I reserved a single room.

We booked a double room.

Koushirou is my best friend.