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1. Theheart's vena cava isa major blood vessel that carries oxygenatedblood from the lungs to the restof the body.
心脏的静脉是一条主要的血管，它把从肺部输送来的富含氧气的血液输送到身体的其他部位。
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2. During surgery, surgeons oftenneed to cannulate the venacava to access the heart for anesthesia.
在手术中，外科医生经常需要通过穿刺静脉来接触心脏进行麻醉。
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3. Vena cava syndromeis a rare condition where the veinsin the chest and back are blocked,causing swelling and pain in the chest andback.
静脉阻塞综合征是一种罕见的状况，其中胸部和背部的静脉被阻塞，导致胸背肿胀和疼痛。