经济学家迈克尔·赫德森的研究揭示了这个体系更深的逻辑:各国之所以“不得不”持有美元、买入美债,是因为整个国际贸易体系是被强制性地用美元计价的——首先是石油,然后是大宗商品,然后逐渐蔓延到几乎所有重要的国际贸易品。
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Estimated reduction possible with process improvements。同城约会对此有专业解读
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It was only after reading this that it occurred to me that we've been overloading names with functionality for a long time.