The Polish literature of the period was based on two main concepts.

What the student's didn't need was an introduction to the main concept.

There are three main concepts in this theory: society, self and mind.

The main concept of hair in this version is also not extremely important.

The second main concept was that the show be free of any blood, gore, or shock.

The album's main concept is based on the four elements.

It has become the main concept which defines a modern computer.

By May 1962 the main concepts for a simulation language were set.

The main legal concept in article 138 is bad faith.