This plan is impossible.

Free fatty acids are used as an energy source in the body.

Essential fatty acids are important nutrients for our health.

This food is rich in higher fatty acids.

Essential fatty acids play an important role in our health.

Lower fatty acids play an important role in human health.

A mass noun refers to a noun that cannot be counted.

He is always the type of person who says this when that is said.

The exam ended and the results were good, so I thought 'all's well that ends well'.

I acted just as he said.