来自《耶鲁大学开放课程：基础物理 第1集 第1集》

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  Then you take that formula here
  你再拿这个式子
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  and you put it here,
  把它代到这里
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  that will see a times t, you put this expression.
  这里就有at 带入表达式
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  So what will you get?
  你将会得到什么
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  We'll get an expression in which there is no t;
  我们现在得到了一个不含t的表达式
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  t has been banished in favor of v.
  t被v替换掉了
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  So, I'm not going to waste your time
  我不会问你们把式子带进去以后怎么算
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  by asking what happens if you put it in.
  这完全是浪费时间
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  I will just tell you want happens.
  我直接告诉你们结果
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  What happens is, you will find that v^(2)=v0^(2)+2a times (x-x0).
  结果就是v^(2)=v0^(2)+2a(x-x0)
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  How many people have seen this thing before?
  有多少人之前见过这个式子
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  That's a lot.
  看来有不少