In physics, it is said that when matter and antimatter come into contact, they undergo annihilation.

The tracker dog was helpful in finding the fugitive.

He is an excellent tracker and never gets lost in the forest.

I check the news on Twitter every day.

He was surprised to hear the news that the plane had crashed.

The police started chasing the criminal.

He asserted his droit de suite as an artist.

He is good at fastening his tie.

In Greek mythology, Oceanus is considered the god who rules the primordial sea.

In my house, we use soft water for cooking.