First, you need to switch on the computer.

首先，你需要打开计算机的开关。

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And all you need to do is simply switch on the computer.

并且所有需要你做的就是简单地在计算机进行切换。

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The electric station is controlled with the help of the mnemocircuit. The computer can be used to switch on and off the entire equipment on the electric station.

借助于简略电路对发电站进行控制。计算机可开关发电站的所有设备。

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Imagine I have a little lamp, a little goose- one of those little gooseneck lamps, I'd put it on the table here, I'd put the height about a f-- about a foot off the table. And if I was really good, - I could hit, or time it so that when I hurt- yeah, try again. When I turn this on switch on in the lamp, at exactly the same time, I'm going to hit a key on my computer and start it running.

想象下我有一个那种小雁颈台灯-,我把它放在桌子上，大概离桌子，有一英尺那么高吧,这样挺好的，我可以打开-,或者关闭这灯,并在这同时，我可以让我电脑,开始运行。

麻省理工公开课 - 计算机科学及编程导论课程节选

When one computer wants to talk to another that is not on the same switch, it must find a path to that computer called a frame.

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Technological changes such as the rise of collaboration tools make it easier to multi-task: you can have a chat window, a word-processing document, a Web browser, and other applications all open at the same time on your computer, and switch easily between them.

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For example, users can switch from a favorite HD movie on a Blu-ray player to the computer, viewable on the HDTV, to quickly send an email and then return to the film.

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