NPA是National Physicians Alliance的缩写，意思是全国医生联盟。
重要词汇
1、national adj. 国家的，民族的
例句：Many national newspapers rallied to his support.
许多全国性报纸一致对他表示支持。
2、physicians n. [内科]内科医生（physician 的复数）
例句：Many resident doctors complain that they are assigned too many duties that are usually not performed by physicians.
很多住院医师抱怨他们被指派了太多通常不由内科医生完成的职责。
3、alliance n. 联盟，结盟，结盟团体
例句：So far the French alliance had profited the rebels little.
到那时为止，法联盟还没让叛军得到多少好处。
