The " great arteries" , are these two main arteries taking blood away from the heart —the aorta and pulmonary artery.

大动脉指的就是这两条把血液带离心脏的主要动脉：主动脉和肺动脉。

So transposition of the great arteries, or TGA —you might be able to guess— is when these two arteries swap locations.

所以大动脉转位（TGA），顾名思义，就是指这两个动脉交换了位置。

If these two great arteries, the aorta and pulmonary artery, don't divide, you essentially have this massive artery coming from both ventricles.

如果主动脉和肺动脉这两条大动脉不分开的话，你就会有这条从心室发出的大动脉。

Less commonly, babies can have levo-transposition of the great arteries, or l-TGA, with levo meaning that the aorta's primarily to the " left" of the pulmonary artery.

更少见地，宝宝可能会有左旋-大动脉转位，即L-TGA，左旋的意思是主动脉主要位于肺动脉的左侧。

In this form, the great arteries still connect to the wrong ventricle, but it's just that the ventricles are the one's that switch places along with their atrioventricular valves.

在这种构造中，大动脉仍然连接着错误的心室，只是心室和房室瓣是一起交换位置的。

But do I desire unreasonably much in wanting what is called life—music, poetry, passion, war, and all the beating and pulsing that are going on in the great arteries of the world?

但我需要所谓的生活——音乐、诗歌、热情、战争以及世界大动脉里的种种跳动和搏动，难道说这样太无理太过分了吗？