He is a specialist fool, with no interest in anything outside his field.

He couldn't say anything about issues outside of his field of expertise.

There are many different specialty stores in this town.

The Earth's exosphere is located at the boundary with space.

The earth's atmosphere provides the oxygen necessary for us to live.

Please avoid this road because it's dangerous.

He abstained from his voting rights in the election.

Because her immune system is weak, she catches a cold easily.

We acquired the easement of the neighboring land to build a new building.

The exosphere is the outermost layer of Earth's atmosphere.