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calorie – n. an amount of food having an energy-producing value of one large calorie
biochemical – adj. represented by, produced by, or involving chemical reactions in living organisms
mechanism – n. a process or system that is used to produce a result
impractical – adj. not easy to do or use
regular – adj. happening or done very often
basis – n. a fixed method or system for doing something
functioning – v. to work or operate
maintenance – n. the act of keeping property or equipment in good condition by making repairs or correcting problems
