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 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
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  And those holes were made by taking this tip and pressing down
  这些洞是由于探针的顶端挤压样品时
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  and scratching a little bit to knock some of the molecules away.
  将少量分子刮离了表面所造成的
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  So the larger pit is five nanometers deep,
  较大的坑洼处大概有5纳米深
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  which means it's four layers of molecules
  也就是说大约4层分子层
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  that've been knocked off in there.
  被刮离了表面