an area in the northern US, including parts of the states such as Illinois, Michigan, Indiana, Ohio, and Wisconsin, where many large older industries, especially the steel and car industries, have become less successful and many factories have closed down 工业[经济]衰退带〔指美国北部的伊利诺伊、密歇根、印第安纳、俄亥俄及威斯康星诸州的部分地区,当地许多大型的传统工业出现衰落〕