The Neogene period is a part of the geological era, which lasted from about 23 million years ago to about 2.6 million years ago.

The Paleogene period was a very important time in the history of the Earth.

The Quaternary is the most recent era in Earth's history.

His first adjective is 'beautiful'.

He is learning how to use the second adjective.

In our company, we always adhere to the principle of safety first.

This contract prohibits interference by a third party.

He is good at solving technical problems.

He always has an optimistic attitude.

His music is very avant-garde, and some people might not understand it.