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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  where you go zoom, zoom, zoom, zoom, zoom, zoom, zoom, zoom,
  镜头不断来回移动
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  and then you go back to the top,
  然后又回到上端
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  zoom, zoom, zoom, zoom, zoom,
  继续来回移动
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  say how high it is at every point along the scan,
  随着扫描观察每一点的高度
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  and then color code it to show how high.
  然后用颜色标记高度
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  So the width of this is about 600 molecules, right?
  这个宽度大约是600个分子
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  But the lines you see, which are ledges that go up and down;
  你们看到的线条就是表面凸起的部分
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  each of those ledges is one unit cell, 1.7 nanometers,
  每个凸起代表着一晶胞 1.7纳米高
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  one set of molecules.
  一组分子
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  So these are -- and that,
  你会发现
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  the thing at the top surface where it's flat, is absolutely flat,
  该表面还是较为平坦的
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  except for there's little holes there.
  除了上面有一些小洞