That economy and that society go forward and flourish for, as I say, about 400 years maybe--perhaps about 400 years.

这种经济和社会,发展繁荣了,大概四百年,也许四百年

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I think the San Francisco economy is probably one of the top economies in the country right now.

我认为旧金山是美国经济发展最繁荣的地方之一。

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