来自《耶鲁大学开放课程：基础物理 第1集 第1集》

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  determine your overall course grade.
  作为你的课程最终成绩
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  This is something I used to announce near the end,
  这些话我以前都是在期末的时候说的
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  but then some people felt that it's
  但后来有些同学反映
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  not fair not to know this from the beginning.
  如果不在课程一开始知道这些会很不公平
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  So,I'm telling you from the beginning,
  所以我在开始告诉你们
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  but don't dream and think that somehow the Final's
  但是 不要以为你们的最终成绩
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  going to be so much different
  和你们的平时表现
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  from your regular day-to-day performance,
  没什么关系
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  but to give you some reason to live after the Midterm.
  但这能让你们不至于期中的时候就绝望了
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  So,you feel there is hope.
  你能感觉还有希望
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  I can change everything overnight;
  我能一夜之间扭转乾坤
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  it does happen. I put that in for a reason
  确实有过这样的例子 我这样做是因为