单词 | precava |
释义 | precava (extremely rare) n WORD FAMILY precava 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 Syn|Hyper superior vena cava vena cava either of two large veins that return oxygen-depleted blood to the right atrium of the heart |
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