来自《耶鲁大学开放课程：生物医学工程探索 第22集 第22集》

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  So it works, and we've known for about 20 years or so that it works
  它有用并且我们知道它有用约二十年了
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  but it doesn't work well enough,
  但它的效果不够好
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  so how could I make it better.
  那我怎么让它的效果更好呢
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  Well, one way you could make it better is by changing the material.
  其中一种改善的办法是改变材料
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  Maybe the properties of the material weren't right,
  也许材料的属性不对
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  maybe the cuff on the outside is too impermeable
  也许在外的筒口是不可渗透的
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  and you'd like to have molecules exchanging in some way.
  你想要分子以某种方式交换
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  Maybe it's not permeable enough
  也许它的渗透性不是很好
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  and so you need to regulate it that way.
  因此你需要用调节这个属性
• 
  
  Maybe you don't want a nerve cuff
  也许你不想要一个
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  that's filled with just air or just water,
  其中填满了水或者空气的神经袖
• 
  
  but maybe you'd like a nerve conduit
  也许你想要一个神经导管