To be sure, there is economic diversity within the elderly, and many older Americans are poor.

可以肯定的是，老年人内部存在着经济差异，许多美国老年人都很穷。

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The major problems of the travel and tourism industry that have hidden, or obscured, its economic impact are the diversity and fragmentation of the industry itself.

旅游业本身的多样性和碎片化是其隐藏或掩盖其经济影响的主要问题。

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However, the nature of this very diversity makes travel and tourism ideal vehicles for economic development in a wide variety of countries, regions or communities.

然而，正是这种多样性的性质使旅游业成为许多国家、区域或社区经济发展的理想工具。

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Ted Weinstein, HPD's director of Bronx planning, said economic diversity is vital for the area.

WSJ: A Shift in the South Bronx

The other big problem has to do with a lack of economic diversity.

FORBES: Magazine Article

The place is 99% white, so white and rich indeed that more adventurous parents send their children to private schools for some racial and economic diversity.

ECONOMIST: Urban life: In Dallas, a new drummer | The