In this form, body and soul are two different substances.

The first thing we do in chemistry is set fire to different substances and get the kids to describe what they see.

"One thing - how did the different substances find their way in and out of the right system?"

The old guess at half a million different substances was long exceeded.

We must have worked on well over a hundred different substances and there was absolutely no doubt about it.

This makes it possible to identify different substances within a test sample.

That is, he deals in a number of different substances.

It was as though her body had changed into a different substance.

The shapes of our thoughts were the same, but the substance quite different.

And the cold air - like getting a different substance into your lungs, water or another element.