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After the tenth century, China's leading export was
Sugars
Carbohydrates that are sweet to taste, soluble in water, and used as a source of energy by living organisms.
Hundreds-Thousands
A numerical range indicating quantities or counts from 100 to 999, often used to describe approximate figures.
Carbohydrate
Organic compounds consisting of carbon, hydrogen, and oxygen, serving as a major energy source in the diet of animals and humans.
Polymer
Long molecules made up of repeating units called monomers, found in numerous natural and synthetic materials.