"Then they must be using a lot of power behind them, right?"

She knew more than fifty names the kids had made up and used behind her back.

Efforts have been made to use the theory behind the sign to report a quantitative result.

He used the back stairs behind the cafeteria to reach the second floor.

Another goal is to be easy to use behind firewalls.

Is the worst thing you've seen someone using a mobile phone behind the wheel?

The company also used the garages behind the school for storage.

The house itself is used as office space, with modern laboratory buildings beside and behind it.

Former drug and alcohol abusers are also difficult, he said, because there is always a chance they will start using again behind his back.

Ford recalled that he and his friends used the garage behind the house as a social club.