简要介绍这一领域的研究概貌，包括环境材料的概念，环境材料研究的重要性和紧迫性，以及环境材料的表征与评价方法。
In this paper the concept of Ecomaterials, the recent status, the importance and the urgency of the research field, and the characterization methods for Ecomaterials are briefly outlined.
给出了在平均状况下和太阳活动下近地环境电性能的总概貌，重点在靠近地球表面的低层、中层大气区域；
A brief picture of the electric properties is therefore outlined in the near Earth region both in average and solar active conditions.
给出了在平均状况下和太阳活动下近地环境电性能的总概貌，重点在靠近地球表面的低层、中层大气区域；
A brief picture of the electric properties is therefore outlined in the near Earth region both in average and solar active conditions.
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