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precava是什么意思

precava

美[ˌprɪ'keɪvə]  英[priː'keɪvəkɑː]
n.  [动]前腔静脉
  形容词:precaval  名词复数:precavae
  近义词:superiorvenacava,

英英释义

Noun
  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
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