Yu is not only his name, but also represents the courage that always exists in his heart.

Yuu is hanging out the laundry.

He saw the character '憂', and remembered his deceased friend.

Yuu believed in divine help from God.

Cold fusion is a part of physics and is a phenomenon that is not yet fully understood.

Research on cold fusion is still controversial.

Could you tell me your postal code?

The number of nuclear-armed countries is increasing worldwide.

Universal gravitation affects all objects on Earth.

This eigenfunction is one of the fundamental concepts of quantum mechanics.