Superior vena caval的用法和樣例：
例句
- The posterior borders of the left ventricle and inferior vena cava are well seen.
左心室和下腔靜脈的后界看得很清楚。 - Its etiology is assumed to be abnormal embryologic development of the inferior vena cava as a result of atrophy failure of the right subcardinal vein in the lumbar portion.
導因為下腔靜脈的異常胚胎發(fā)展結果導致在腰部的右側心下靜脈未萎縮。
