Consider the United States. No one even keeps track of, say, Florida’s current-account deficit with the rest of the country, although we can safely guess that it is huge (since the state is home to many retirees living off benefits that come from elsewhere).
就拿美国来说吧。根本不会有人关心（比如）佛罗里达州对美国其余部分的经常项目赤字，尽管我们可以大胆猜测这笔赤字不会小（因为大量来自其他地区的依靠退休福利生活的退休人士生活在佛罗里达州）。