来自《耶鲁大学开放课程：金融市场 第3集 第3集》

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  That's information technology.
  这就是信息技术
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  You really need that because
  你真的很需要这项发明
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  if you have only one copy of something,
  因为要是你只有一份的话
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  you don't have a backup;
  你就没有备份
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  so, you can store the one copy separately.
  这样的话 你就可以将副本单独留存
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  Also, in the nineteenth century, the typewriter was invented.
  而且在19世纪打字机也被发明了出来
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  Of course, that may be the core idea of a computer.
  当然 这或许就是电脑的核心思想
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  Your computer looks like a typewriter,
  电脑长得很像打字机
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  but a typewriter just speeds recording of information.
  但是打字机只能速记信息
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  Tests show in the nineteenth century that
  通过测试显示 在19世纪
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  people could type four or five times as fast as they could handwrite
  人们打字的速度是手写的4至5倍
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  and there's no ambiguity
  而且也不存在字迹模糊的问题