音标：[,pri:'keivә -kɑ:-] ；

n. [动]前腔静脉

n 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

词型变化：名词复数形式 : precavas

【近义词】

superior vena cava上腔静脉

字源大挪移 Prefix - 表示方位的字首 08 pre

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