来自《耶鲁大学开放课程：新生有机化学 第4集 第4集》

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  So we're actually feeling
  因此通过AFM
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  individual molecular heights with this thing.
  我们可以感知单个分子的高度
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  There's an interesting point here that I'm not going to dwell on,
  有一点很有趣 但我不想花太多时间
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  but the smallest one did not lose any molecules.
  最小的坑并没有损失任何的原子
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  If I back up, watch the smallest one.
  如果我倒回去 看最小的那个坑
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  It always stays the same size as the others dissolve.
  他在溶解过程中一直保持自己的大小
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  That's an interesting puzzle isn't it?
  这是一道趣题不是吗
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  But at any rate, you can do it.
  不过言归正传 这实验是你也能做的
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  And you can measure the rate at which different ledges dissolve.
  而且你还能测量每条缘融化的快慢
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  Some dissolve much faster than others.
  其中一些比其他一些快得多
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  Here's scanning tunneling microscopy.
  这是一张隧道扫描显微照片
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  This is done in a different way.
  是用另一种方式拍摄的