English Dictionary

around

/əˈɹaʊnd/

adj

(informal, with the verb "to be") Present in the vicinity. / (informal, with the verb "to be") Alive; existing.

I had a great time hanging around with my friends.

意味（1）

(informal, with the verb "to be") Present in the vicinity.

Is Clare around today?

意味（2）

(informal, with the verb "to be") Alive; existing.

Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo, meaning vortex, and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.