This example already contains the key concepts of the general case.

The key concept is a little more sophisticated than that.

There are two key concepts involved in such an analysis.

However, it remains a key concept in the areas of education and management.

The key concept of the series was that each show starts off with the letter "A".

One key concept put forward was that war is inherently cultural.

The key concept was coming up, and it had to be presented properly.

Could the idea of fraternity become the key concept for the 21st century?

The key concept here is that of European added value.

The key concept, these three months, is: we stick together.