本文提出了三维灰色地理信息系统（3DGGIS）理论，从基础存储层、技术支撑层和专题决策层等方面详细论述了研究内容。
The author gives the research hierarchy of 3DGGIS and dwells on the contents of basic model lever, middle technical lever and high thematic lever.
介绍了在涤纶片基上涂布吸墨层，制作透明绘图胶片的方法和使用该胶片进行专题图、地形图审校的工艺。
A new method is introduced to make transparent plot films, in which a blotting layer is coated on terylene film base.
这次涉及世界环保问题专题研讨会的成功举办表明增强环保意识已取得中国决策层的高度重视。
The success of the forum heightened the consciousness of Chinese top decision makers on the need for environmental protection.
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