rust belt
noun /ˈrʌst belt/
/ˈrʌst belt/
(especially US English)- a region that used to have a lot of industry, but that has now decreased in importance and wealth, especially parts of the northern US where there were many factories that have now closed
锈带（尤指美国北部衰败或萧条的工业区） - Buffalo is an American rust belt city that was home to several steel mills.
布法罗是美国一个衰败的工业城市，过去有几家钢铁厂。
- Buffalo is an American rust belt city that was home to several steel mills.