He opened the window to let fresh air into the room.

At what point in Earth's history does the Triassic period fall?

What was the motive behind his actions?

The development of this essay is written very skillfully.

The primitive salamander is a species unique to Japan and is a very rare creature.

The salamander is a unique creature that inhabits fresh water in Japan.

The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 200 million years ago.

The Indian cow, or zebu, is known for its distinctive hump.

Zebu, also known as Indian cattle, is a type of cattle often seen in tropical regions.

My favorite fruit is kiwi.