Loss is the operative principle for us: teeth, hair, balance, hearing and much of our memory.

Collaboration and community involvement are the operative principles here, with artists giving lectures, running workshops or involving outside participants in the execution of their work.

This is because the partial pressure of water increases with temperature - the operative principle behind everything from hair dryers to dehumidifiers.

For Americans, whose operative principle is let a million camcorders bloom, the idea of a people being able to tell their story despite repression must be inspiring.

Could this be a universal truth, some starry, operative mathematical principle?

But the operative principle is Ronald Reagan's: trust but verify.

The latter is clearly the operative principle.

The operative principle here is to think of Champagne not as one wine but as a category of wines - with bubbles.

The operative hermeneutical principle in the New Testament was prophecy fulfillment.

The operative principle is whether the trust assets or income are available to the beneficiary.