英语语法分析

The rest of the patients are well to puncture the vena cava.

其余患者穿刺均顺利到达上腔静脉。

This is the classic finding of a persistent left superior vena cava.

这是典型的永存左位上腔静脉。

The two main veins that connect to the heart are called the vena cava.

两个与心脏相连的主静脉叫做大静脉或腔静脉。