来自《耶鲁大学开放课程：新生有机化学 第7集 第7集》

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  in a cage sort of thing
  要柔软的多
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  But typically they're vibrating by about 0.05 angstroms,
  但总的来说它们的振幅在约0.05埃
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  which is twenty-five times as big as the precision
  是所知的原子平均位置精度的
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  to which the position of the average is known.
  25倍
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  So no molecule looks like that at an instant,
  所以分子在任何一刻都不是静止的
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  the atoms are all displaced a little bit.
  分子都会发生一点位移
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  Now how big is that?
  这个移位有多大呢
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  Here, if you look at that yellow thing,
  看那个黄色的圆点
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  when it shrinks down, that's how big it is,
  如果收缩到底 就有这么大
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  that's how big the vibration is.
  振动的位移就有这么大
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  It's very small.
  非常之小
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  But these are very precise measurements.
  这些测量结果都非常精确