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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  as they're called, that you can use.
  这V形叫做悬臂
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  Here's a higher resolution electron micrograph
  这是一张高分辨率的电子显微镜照片
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  that shows the tip of one of these v's,
  显示了其中一个V形的顶端
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  and you see a little bulge here, at the bottom,
  你可以在底端看到一个小凸起
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  and if you zoom in on that you see this; it's a little pyramid.
  如果放大会发现那是一个小金字塔
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  And so at the bottom of that pyramid
  在那金字塔顶端
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  the radius of curvature of this tip is only about twenty nanometers,
  顶端的曲率半径大约只有20纳米
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  so about the size of twenty molecules.
  也就是大约20个分子的尺寸
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  It's round on the tip, it's not truly pointed
  该顶端是圆的 并不是真正的一个
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  and come to nothing; it's a little bit rounded.
  有所指向的尖端 它是圆的
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  You can buy ones that are a third that size,
  你可以买到只有原尺寸三分之一的这东西
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  their radius of curvature.
  我是指其曲率半径是原三分之一