来自《耶鲁大学开放课程：基础物理 第17集 第17集》

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  Meanwhile, this would have oscillated
  同时 这个将会
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  some number of times.
  振动有限次
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  But if you wait long enough
  然而 如果你等待足够长的时间
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  this exponential will start coming into play
  这个指数将会开始朝着
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  and the way to think about it is,
  你想象的方式变化
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  it's an oscillation whose amplitude itself falls with time.
  这个振子的振幅会随着时间推移而减小
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  And if you draw a picture of that,
  如果你据此画一张图
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  I think you will not be surprised
  如果你得到的图是这样的
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  that if you draw the picture it will look like this.
  我想你不会感到惊讶
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  It's called a damped oscillation.
  这被称为阻尼振动
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  So, that's the method by which you describe
  这是你用来描述
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  the three cases.
  三种情况的方法