1. vena cava obstruction syndrome 
   腔静脉阻塞综合征
2. The superior vena cava. 
   前腔静脉
3. A large vein that returns blood to the heart from the lower half of the body; the inferior vena cava. 
   （畜类的）后腔静脉将血液从下半身送回心脏的大静脉；低级腔静脉
4. obstruction of urinary system 
   泌尿系统梗阻
5. remove objects of obstruction. 
   把阻塞或妨碍的东西移走。

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• 1. 上腔静脉梗阻
  上皮移植||epithelial transplantation...上腔静脉梗阻||obstruction of superior vena cava...上腔静脉综合征||superior vena cava syndrome
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