Ray Dalio: 事实上，我们可以使用六个关键标志来评估一个帝国的健康状况。如果当前的世界领先大国美国想要保持强大，这些都是需要关注的领域。 (2/3)

原推：In fact, there are six key signs we can use to assess the health of an empire. If the current world leading power, the United States, wants to remain strong, these are the areas to focus on. (2/3)
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