He cleaned the bowl of the pipe thoroughly.

This cigarette contains carcinogens.

I used binoculars to observe birds in the mountains.

It is said that this substance has a high carcinogenicity.

He emphasized that there is still much to do, saying 'It's a long road ahead as the sun sets.'

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.