来自《耶鲁大学开放课程：新生有机化学 第1集 第1集》

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  So I was torn this year as to whether to have you do them from scratch
  今年我左右两难 不知该让你们重新开始
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  or whether to modify last year.
  还是修改去年的内容
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  I figured modifying last year is better
  我想修改去年的内容比较好
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  because then you have something to read earlier on,
  因为对那些没有参与编辑的人而言
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  for those who are not working on developing it.
  这样就有以前的内容可供阅读
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  So anyhow, but the hope is--so if you modify it--
  无论如何 我希望 如果你修改它
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  it has to be something significant,
  必须进行某些显著的修改
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  not put a comma in or something like that,
  不是加一个逗号之类
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  but add something useful to understanding.
  而是添加一些有助于理解的东西
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  If you do it within thirty-six hours,
  如果你于三十六小时内修改它
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  you get two points,
  可以得到两分
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  and if what you do is really good, you get three points.
  如果你做的很棒 就会得到三分