He continues to search for the secret of longevity.

This dynasty lasted for centuries.

The atmosphere of this song is very calming, isn't it?

He was surprised by the recoil of the gun.

His way of speaking is very monotone.

His job is a daily monotony routine.

He was asked to coordinate the schedule.

The air conditioning in this room is very efficient.

We have to cooperate to make the project successful.

It's better not to respond to his provocation.