来自《耶鲁大学开放课程：基础物理 第1集 第1集》

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  I mentioned to you in the website
  我在网上也跟你们提到过
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  that this is not the big opportunity
  这不是一个你期待已久的
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  you've been looking for to be a star.
  成为大明星的机会
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  Only the back of your head will be seen.
  观众们只能看见你的后脑勺
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  In some cases,
  有些时候
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  the back of the head could be more expressive than the front,
  后脑勺确实比正脸更有表现力
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  in which case this is your opportunity and I wish you luck.
  这才是你们的机会 祝你们好运
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  But otherwise, just don't worry about it
  除此之外 就不要管它了
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  because you will be only heard.
  因为观众最多只能听见你的声音
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  You may not even be heard.
  还有可能听不见你的声音
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  So, I've been asked that if a question is not very clear,
  工作人员要求我 如果某个问题听得不清楚
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  I should repeat it
  我就需要重复一遍