来自《耶鲁大学开放课程：生物医学工程探索 第25集 第25集》

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  since there's blood flowing by,
  而因为那里有血流通过
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  pieces of that clot could be expelled from--
  最终 一块血栓会脱落
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  or detached from the surface of the material.
  或从材料表面游离
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  They would flow into your blood.
  血栓会进入血液循环
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  If they flowed up into your brain, for example,
  比如 如果血栓流入大脑
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  they could clog smaller arteries inside your brain
  可能就会阻塞你大脑中的某条小动脉
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  and cut off blood flow to that region.
  阻断该区域的血供
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  That process is called embolism.
  这个过程称为栓塞
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  Embolism is when a small
  栓塞就是
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  particle is released into your bloodstream,
  一个小颗粒被释放进入血流
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  and embolism can cause all sorts of unwanted effects.
  而栓塞能导致各种不堪的后果
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  So, a bad heart valve might give you a stroke in the brain.
  换言之 不好的心脏瓣膜会让你中风