大动脉的英文：
aorta

It has a catchment area of 1,809,000 square kilometers, and is the major inland-river transport artery in China.
流域面积180.9万平方公里，是中国内河运输的大动脉。

The abdominal aorta is normally smaller than the thoracic aorta.
腹主动脉一般比胸主动脉小。

Examination of the aorta using x - rays following the injection of a radiopaque substance.
主动脉造影术在注射防辐射线穿透的物质后用X射线对主动脉进行的检查

Sudden deceleration may also result in shearing injury to the intima of the aorta
突然减速也可能造成主动脉内膜的剪式裂伤。

The heart appeared to be of aortic type with a tortuous and prolonged aorta. Culture of the sputum showed growth of Streptococcus pneumonia.
心脏呈动脉型,主动脉曲屈延长。痰培养肺炎双球菌生长