Certain key ingredients are essential in just the right measure.

However, some key ingredients will be the same as in other years.

Oil was perhaps the key ingredient of inflation in the 1970's.

It would be better known except for problems getting, you know, the key ingredient.

The Cowboys have all of the key ingredients in place.

Health care and education are key ingredients in our social system.

Not so, however, key ingredients in two of the top house desserts.

Others insist the key ingredient is love or even music.

However, the key ingredient is not in the recipe but on the table.

Water is a key ingredient of life as we know it.