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.

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。

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The PC managed to stay vital longer because it was a more general-purpose machine--exciting new applications were invented for it on a regular basis.

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It's possible, we guess, though such a tablet would be counter to the arguments made at the iPad launch where Jobs and Co praised the device for being purpose-built to excel at specific tasks -- TechCrunch's device sounds like a general purpose machine.

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