Vena centralis

例句：

1. 1. The heart's bloodflow is facilitated by the presence ofa central vein.
   心脏的血液流动得益于中央静脉的存在。
2. 2. The surgeon carefully removed thecentral vein to prevent infection.
   外科医生小心翼翼地切除了中央静脉以防止感染。
3. 3. The patientwas given medication to treat the central veinthrombosis.
   患者被给予药物来治疗中央静脉血栓。