The new system must permit aircraft to be flown safely.

All systems permit testing using this method, but it is not always applicable.

However, that system permits a long period of supervised learning.

The system also permitted a degree of communication between air and ground forces.

The system permits individuals to win up to $3,500 and lose a maximum of $200.

A public key system permits two parties who have never met to exchange secret information.

The system also permitted a country to give a single award of 9 points, but it never happened.

But our system doesn't permit us to get involved in competition.

But more systems in recent years have been permitting passengers to bring bikes.

"I think the current system permits student-athletes in basketball to move through school without getting a degree."