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precava [pri:'keivə -kɑ:-]    我要挑错精准翻译

参考词典中precava的常规释义:

基本释义
  • 前腔静脉
英英解释
  •  1个名词解释

    1. receives blood from the head and arms and chest and empties into the right atrium of the heart; formed from the azygos and both brachiocephalic veins
      [同] precava, superior vena cava
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