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model
model. Something made to resemble something else, such as a miniature automobile or person (doll). A model has some features of the thing it represents but lacks others. As a result, it can be smaller, cheaper, more convenient, or otherwise more suitable for a certain purpose than the "real" object. In addition to physical models, there now are mathematical or computer models of complex phenomena, such as a business, a city, or a national economy. These computer models can be used to simulate actual or potential developments in the real world, and such simulations can guide policy makers in deciding on actions to take.
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