硬件包含了计算机中的电子的和物理的部件，而软件包含了控制各硬件部件的程序。
Hardware comprises the electronic and physical parts of the computer. In contrast, software comprises the programs that reside and control each hardware component.
硬件越老，就越难找到部件。
The older hardware becomes, the more difficult it is to find parts.
比方说，一个关键字可以扩展成菜谱中的重量单位、硬件参考中的部件名称或者编程参考中的变量。
For example, a keyword can be extended as a unit of weight in a recipe, as a part name in a hardware reference, or as a variable in a programming reference.
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