Ryusei is my best friend.

Last night, when I looked up at the sky, a meteor suddenly streaked across.

A large piece of driftwood was washed up on the beach.

A large amount of electric current is flowing through this power line.

Charged particles are affected by electric and magnetic fields.

This building was erected last year.

Plans are underway to erect a new building.

He attacked the enemy using a shrapnel.

Sulfurous acid is often used for food preservation.

He is good at playing the ryūteki.