养分耗竭使利润循环停滞，阻碍个人、省份和国家经济以及粮食生产的增长(图2)。
Resource depletion helps stall the profit cycle and prevent growth in the personal, provincial and national economies, as well as in food production (Figure 2).
循环流动图是经济的视觉模型，展示美圆（ 货币）是如何通过市场在家庭与企业之间流 动的。
Our First Model: The Circular-Flow Diagram The circular-flow diagram is a visual model of the economy that shows how dollars flow through markets among households and firms.
循环流动图是经济的视觉模型，展示美圆（ 货币）是如何通过市场在家庭与企业之间流 动的。
Our First Model: The Circular-Flow Diagram The circular-flow diagram is a visual model of the economy that shows how dollars flow through markets among households and firms.
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