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但是，从商业角度看来，嵌入式系统不适合作为多用途计算机或设备的代替系统。
But an embedded system may not be used as a commercially viable substitute for multipurpose computers or devices.
元编程在大型计算机编程中有许多用途。
Metaprogramming has many uses in large-scale computer programming.
个人计算机的魅力在于它是一种多用途的机器，任何新功能可以通过安装一套软件而实现。
The magic of the PC is that it is a general-purpose machine to which new functions can be added simply by installing a new piece of software.
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