We observed the reaction using soda ash in a chemistry experiment.

The octopus wiring in this room is dangerous.

He admitted defeat.

I prefer to use natural cosmetics.

The geology of this area is mainly composed of aqueous rocks.

This area is rich in peridotite.

This area is rich in basalt.

He moved his eyeballs to look at me.

He was observing the distant birds with binoculars.

His stubbornness sometimes causes problems.