为了为美国游憩与公园协会准备一篇报告，来自美国宾州州立大学的研究员处理了来自各种研究的数据。
Researchers at Penn State crunched the Numbers from a variety of studies, for a report they prepared for the National Recreation and Park Association.
在桂林国家森林公园选择不同的植被群落类型进行空气离子浓度监测，研究森林游憩区空气负离子浓度水平变化。
To study the variation of aero-anion concentration in forest recreational areas, the concentrations of aero-ion were measured under different vegetation types in Guilin National forest Park.
景观结构和游憩活动是研究风景区旅游问题的重要内容，然而至今尚未对磨山景区进行这方面的研究。
Landscape structure and recreational activities are important contents on tourism research in scenic Spot. But there are not few researches in these areas in Moshan Resort.
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