求翻译：However, another nickname for Chicago is still true today. It is The Windy City. Chicago sits next to Lake Michigan, one of North America's Great Lakes. Language expert Barry Popick says on his web site that Chicago was called a "windy city" because of the wind that blows off of Lake Michigan. In the eighteen sixties and seventies, Chicago was advertised as an ideal place to visit in the summer because of this cool wind.是什么意思？

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