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Many buttons contain two sizes of vesicles; the larger ones typically contain
Opportunity Cost
The value of the next best alternative foregone as the result of making a decision.
Sailboats
Sailboats are vessels propelled partly or entirely by sails and are used for navigation, racing, or recreation.
Surfboards
Sporting equipment used in the sport of surfing, designed to ride waves by standing or lying on them.
Production Possibility Frontier
A curve depicting all maximum output possibilities for two goods, given a set of inputs and production technology.
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