production possibility boundary
两者之间用的生产可能性边界(Production Possibility Boundary)就是不同的。不同时，用效率一词就要小心到底以哪一个为准方才没有歧义。
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production possibility boundary
生产可能性边界
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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That efficiency will be crucial if the US is to stay on the boundary of its production possibility frontier in the face of automatic cuts in federal spending that began last month.
FORBES: Manufacturing Is Moving America