研究发现，在（学生）种族比例和（家庭）经济水平趋于平衡的双语课堂有助于孩子们适应社会和文化的多样性。
Ethnically and economically balanced bilingual classrooms are found to be helpful for kids to get used to social and cultural diversity.
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。
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.
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。
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.
这座城市一直以来都有大量的外国出生人口（1990年比例为26.5%），进一步增强了人口多样性。哈佛大学和伯克利大学的经济学家认为，这预示着良好的流动性。
The city had a large foreign-born population (26.5 percent in 1990), leading to broader diversity, which, the Harvard and Berkeley economists say, is a good predictor of mobility.
这座城市一直以来都有大量的外国出生人口（1990年比例为26.5%），进一步增强了人口多样性。哈佛大学和伯克利大学的经济学家认为，这预示着良好的流动性。
The city had a large foreign-born population (26.5 percent in 1990), leading to broader diversity, which, the Harvard and Berkeley economists say, is a good predictor of mobility.
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