His attitude was solemn, and everyone felt a sense of respect.

He touched her hand.

This world is ruled by the law of the jungle.

It is believed that black dwarfs are formed by the cooling of white dwarfs.

She is conducting research on the world's oldest profession.

Rabbits are herbivores and mainly eat grass.

The results of the urine test are out.

The cause of his lateness was a train delay.

He passed away quietly.

He injured his little finger.