So, it is an urgency that the application of GIS and RS is used to the study of ecological enviroment.
在这种背景下将最新的地理信息系统技术和遥感技术应用到生态环境研究就显得非常迫切。
Water is an important part of ecological enviroment, and is an indispensable substance to life and productive activities of man.
水是生态环境的重要组成部分，水是人类生活和生产活动中不可缺少的物质。
Water is an important part of ecological enviroment, and is an indispensable substance to life and productive activities of man.
水是生态环境的重要组成部分，水是人类生活和生产活动中不可缺少的物质。
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