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natural environment
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  natural environment
This paper briefly presents the research progress of the State Major Basic Research Project 2001CB309400, "Theory and Application for Retrieval and Fusion of Spatial and Temporal Quantitative Information from Complex Natural Environment".
      
Trivalent iron almost always prevailed in the acid-extractable fraction in the natural environment.
      
The calculations showed that in the natural environment, the additional light-induced heating of zooxanthellae is not above 0.01°C and that it cannot cause disruption of the animal and zooxanthellae symbiosis.
      
Observations on the development of the dinoflagellate Gyrodinium falcatum in the natural environment (Sea of Japan) and algal cultures were made.
      
The problem is extremely urgent since at least one welded joint failure leads to enormous costs of repair, may cause an environmental disaster and in ict irreparable damage on natural environment.
      
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In the last few years, scientific research and controlling practices on the problems of desertification strengthened furtherly the concrete theoritical researches on the issues and provided a good foundation for the detail rec g-nization of the importance of the worldwide concerned problem. It is attempted to discuss the ecological principles of desertification process and its rehabilitating measures, and it is expected to evoke a heated discussion and bring relevant scientists' attention and interests on the...

In the last few years, scientific research and controlling practices on the problems of desertification strengthened furtherly the concrete theoritical researches on the issues and provided a good foundation for the detail rec g-nization of the importance of the worldwide concerned problem. It is attempted to discuss the ecological principles of desertification process and its rehabilitating measures, and it is expected to evoke a heated discussion and bring relevant scientists' attention and interests on the problem, with the presentation of superficial opinions, and benefit from different viewpoints on the disasters. Definitionally, desertification resides its meaning in the network of alternative interactions amongst natural environment, biology and human society and the desertification is originated in the processes of dislocation of the interrelation among above-mentioned three aspects.

近年来,所开展的有关沙漠化问题的研究工作和防治实践已为该问题的理论深化提供了坚实的基础。本文 图就沙漠化过程及其防治措施的生态学原理进行讨论,虽见解肤浅,但望能藉此引起有关专家对此问题的关注和兴趣,以便共同切磋,从中得到有益的帮助。 沙漠化,其定义本身就已表明,它属于自然环境——生物——人类社会相互交织作用网络中,并产生于其间关系失调过程中。因而讨论沙漠化生态学原理,须包括沙漠化发生的生态学机理、沙漠化过程的生态学属性、沙漠化程度的生态学计价及沙漠化土地恢复的生态工程等四个方面的内容。

In the Yangtze Valley, In accordance with "Environmental Protection law of The People's Republic of China(trial implementation)" and "Regulations for Environmental Assessment and impaetstatement of Water Resources Projects (Draft) "issued by the then Minisry of Water Conservancy, the environmental assessment must be made and the ,impact statement must be prepared for all large and medium water resources projects exerting impacts on natural environment. social environment and eelogical balance. We...

In the Yangtze Valley, In accordance with "Environmental Protection law of The People's Republic of China(trial implementation)" and "Regulations for Environmental Assessment and impaetstatement of Water Resources Projects (Draft) "issued by the then Minisry of Water Conservancy, the environmental assessment must be made and the ,impact statement must be prepared for all large and medium water resources projects exerting impacts on natural environment. social environment and eelogical balance. We have different reguirements for the statement at each planning stage. This paper introduces environmental impact assessment procedures and practices of water resources projects in tne Yangtze Valley. The environmental impact assessment procedures are classified mainly into five basic steps. The contents of the environmental impaet statement vary with the magnitude of projects and the degree of enviromnental impacts, usually including ten parts. Now for river basin planning we must assess not only the impacts due to the key project of the plan, but also the integrated effects of all components (subsystems) of the plan by considering them as a whole.

根据《国家环境保护(试行)》及前水利部《关于水资源工程环境影响评价的若干规定》,在长江流域对自然环境、社会环境和生态平衡有影响的大、中型水资源工程均应进行环境影响评价,提出环境影响评价报告书。对于每一设计阶段均有不同的工作要求。本文介绍长江流域水资源工程环境影响评价的步骤为实际应用。环境影响评价的步骤可分为五个主目部分。环境影响报告书的内容随工程规模及环境影响的程度而异,一般包括十个部分。现在除对个别工程进行环境影响评价外,在流域规划时还把所有各组或工程作为一个整体,提出方案的整体影响。

This paper introduces some problems existing in the exploitation and utiliZation. of Jao Zhou Bay. It Porints out that streng thening management and protecting the natural environment of Jao Zhov Bay are very important. Some preliminary ideas are advaced how to protect the. natural environment of JaoZhov Bay.

本文介绍了在开发利用胶州湾中存在的一些问题,指出,加强管理,保护胶州湾的自然环境是十分重要的,并对如何保护胶州湾的自然环境提出一些初步的看法。

 
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