The United States will need to design its overseas military presence. for the coming decades in a way that responds to the changing inter-. national security environment and that takes into account a view on. how the United States should see its future role in the world.
metabolism. 1  Biology, Physiology. the sum of the physical and chemical processes in an organism by which its material substance is produced, maintained, and destroyed, and by which energy is made available. 2  any basic process of organic functioning or operating: changes in the country's economic metabolism.
Metabolism is a complicated chemical process, so it's not surprising that many people think of it in its simplest sense: as something that influences how easily our bodies gain or lose weight. That's where calories come in. A calorie is a unit that measures how much energy a particular food provides to the body.