A strong base of skilled workers, writes Mr Glaeser, has been a source of long-run urban health.

　
英 美
  • “擁有技能的勞動(dòng)者組成的強大根基，”Glaeser寫(xiě)道，“是城市長(cháng)期健康發(fā)展的源泉?！?/strong>
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