But it has been the critical missing ingredient in the world's most important relationship.

It is a critical ingredient for industry - almost every manufacturing process needs water.

But he always winds up talking about Cox as the most critical ingredient.

These are among the critical ingredients of a visionary artist.

And foreign investment is a critical ingredient of the economy's growth.

"I think we've gotten completely confused about what are the really critical ingredients for success in science," she said.

But these critical ingredients can be imported if public schools work with private companies.

And the experts add that a critical ingredient of early assessment is not speech at all, but hearing.

And, even with these critical ingredients, he has found a core of students who still cannot do algebra.

The second critical ingredient was committing specific resource to the project.