一种令人忧虑的可能性是，以往美国籍以推动增长的特点——劳动力市场的灵活性，以及生产率的快速增长——或许已经成为问题。
One alarming possibility is that the traits the US has relied on to drive growth in the past – labour market flexibility, rapid productivity growth – might have become toxic.
各个地点可能非常大，或者，由于劳动力的灵活性，小到一个人。
Sites may be very large or, as a result of workforce mobility, as small as a single individual.
改善教育和加大劳动力市场的灵活性是长远解决办法的一项关键内容。
Improving education and labor market flexibility is a key part of the long-run solution.
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