Furthermore, some data from oilfields are presented for comparison to illustrate the physical and mathematical model formed by these factors for the assessment of natural gas reserves.

For example, at the beginning of a project, you may be testing to set quantitative baselines (such as time, error rates, and satisfaction) for comparison to later tests of your revised site.

For comparison, let's say you wanted to "jam" a conversation between two people—all you'd need to do is yell in the listener's ear.