在职业网球发展历程中，北美，尤其是美国的网球水平始终居高不下。这同遍布北美各地的网球训练营有着直接的关系。北美，特别是美国的网球训练营的训练水平之高是世界公认的，训练营的训练设施完善，有一套严格、科学的管理体制。更重要的是训练营的教练员都是经过高水平... In the development of professional tennis, North America, especially the United States, has always been the high level of tennis. This has a direct relationship with tennis camps all over North America. The high training level of tennis camps in North America, especially the United States, is universally acknowledged in the world. Training camp training facilities are complete and there is a rigorous and scientific management system. More importantly, the training camp coaches are after a high level ...