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What were the reasons for China's expansion and then decline as an economic power during the eighteenth century?
Oxygen
A chemical element with symbol O, essential for aerobic respiration in living organisms and a key component of the Earth's atmosphere.
Vitamin
One of a group of organic substances present in minute amounts in natural foodstuffs that are essential to normal metabolism; insufficient amounts in the diet may cause deficiency diseases.
Catabolism
The breakdown of complex molecules in living organisms to form simpler ones, together with the release of energy; destructive metabolism.
Chemical Structure
The arrangement of atoms in a molecule or compound and how they are bonded together, influencing the substance's properties and behavior.
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