Englishfor English speakers
building
Noun
—
A building consists of walls, a foundation and a roof that together close in some space.
I work in the Chrysler Building.
expert
Noun
—
An expert is a person who knows more, or can do something better, than most people, usually because of special study or practice.
Zidane is an expert at penalty kicks.
The company has hired an expert in computer systems.