其他品牌和型号的微机在外貌和操作上各有不同。

Other brands and models of microcomputers exhibit difference in appearance and operations.

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你在试图解决问题时，常常需要知道你电脑的硬件的确切信息：品牌和型号，有时还有版本标示。

Many times when you are trying to solve a problem, you need to knowexactly what hardware is in your computer: what brand and model, and sometimes,revision level.

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汽车品牌和型号不同，行车里程也不同，虽然根据经验车的引擎越小每加仑油可行使的里程就越长。

Mileage differ between car makes and models, although a good rule of thumb is that you should get more miles per gallon if your car has a smaller engine.

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