“这要看水分流失的速率”，位于马萨诸塞的Natick的美国陆军环境医学研究所的Michael Sawka说。
"It depends on the rate of water loss," says Michael Sawka at the us Army Research Institute of Environmental Medicine in Natick, Massachusetts.
德鲁•辛德尔是美国航天局戈达德太空研究所的气候学家，他研究了人类活动排放的废气对地球大气环境的影响。
Drew Shindell is a climate scientist with the NASA Goddard Institute for Space Studies.
世界知名的环境分析家莱斯特•r•布朗是美国地球政策研究所的创办者和所长。
Lester R. Brown is an internationally renowned environmentalist, author of numerous books and the Founding President of the Earth Policy Institute.
地图数据源自美国地质调查局及环境系统研究所。
Data for the map were obtained from U. S. Geological Survey (USGS) and Environmental System Research Institute (ESRI).
这是美国宾夕法尼亚大学环境研究所的主页，提供该研究所的师资力量、教学科研、学术活动等相关信息。
It is the homepage of the Institute for Environmental Studies in the University of Pennsylvania, providing its faculty, education, research, events and other information.
这是美国宾夕法尼亚大学环境研究所的主页，提供该研究所的师资力量、教学科研、学术活动等相关信息。
It is the homepage of the Institute for Environmental Studies in the University of Pennsylvania, providing its faculty, education, research, events and other information.
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