ecological selectivity
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国外对选择性旅游的研究主要集中在对其涵义的理解和其给旅游接待地的经济、社会文化及生态环境造成的影响方面，尤其是经济方面。
The research about alternative tourism abroad focuses on the understanding of its meaning and its effect on economy, social culture and environment of tourism destination, especially on economy.
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