His learning came not only from books but from bars and cafs.

他的学识不仅来自于书本，也来自于酒吧和咖啡馆。

Coronary artery fistulas (CAFs) are mostly congenital, but they have been reported to be acquired as complications of chest trauma or medical procedures.

冠状动脉瘘管是属于先天性的疾病，但是也有可能会因为胸部创伤或者是特定医疗行为的并发症所产生。