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The rule of Baiyangdian water eco-system change is put forward according to the controlling variable of water quality and water quantity by catastrophe theory.

通过在分析白洋淀水生态系统的构成与特点的基础上,应用突变理论对白洋淀水生态系统在水量与水质两个控制变量作用下的变化进行了研究,阐述了白洋淀水生态系统状态变化的规律。

In the construction of the flood control projects, it is necessary to give attention to the ecological requirements by reasonably adopting the technologies of the ecological engineering in order to alleviate the negative effects from the hydraulic projects and avoid both the channelization and the discontinuities of the natural rivers.

在防洪工程建设中,需要兼顾生态需求,合理引入生态工程技术,减轻水利工程对河流生态系统的负面影响,避免自然河流的人工渠道化和非连续化。很多发达国家的堤防工程规范中已明确提出了这方面的要求,并发布了有关的技术导则或手册。

The counter measures of solving these problems were suggested as follows: firstly, using water resources and fertilizer reasonably and choosing salt tolerance crops to control saltinization; secondly, choosing acid tolerance feed and using the chemical method to control acid rain; finally, soil erosion could be controlled by bioremediation.

对于三种生态环境问题,提出的控制对策如下:盐渍化的治理对策为合理用水、施肥,种植合适的耐盐作物;酸沉降治理对策为种植抗酸作物和采用化学调控方法降低降对作物的损害;水土流失使用生态恢复工程和生态重建工程进行治理。

To promote the construction of ecological city in China,the article discusses the its meaning,character and theory frame ,and brings about its construction standard.

文章探讨了生态城市的内涵、本质特征和理论框架,提出了生态城市的建设标准,以期推动我国生态城市的建设工

The author has initiated that ecological culture concepts should be integrated in a deeper level in hillside architectural design originality, both should reflect hillside green architectural morphology art expression characteristic based on the narrow strategies, as well as realize the integration of morphological esthetics and the ecological esthetics to manifest the combining of hillside architecture and hillside environment, and should realize the conformity with the humanities ecology based on the generalized strategies originated from local environment, to reflect the regional difference and nationality's particularity , and to manifest the harmony aesthetic value close connected between hillside architecture and the regional social environment, the cultural environment so as to realize hillside architectural significance finally.

作者倡导坡地建筑设计创意中的生态文化理念需在更深层次上进行整合,既要基于狭义的缘地策略反映坡地绿色建筑形态艺术表达的特性、以及实现形态美学和生态美学的整合,体现出坡地建筑与自然环境的合二为一,又要基于广义的缘地策略实现与人文生态的整合,反映地域的差异性和民族的特殊性,体现出坡地建筑与地域的社会环境、文化环境密切关联的和谐美,以最终实现坡地建筑的意义。

On this base, the paper brings in the concept of ecotourism cultural system, which includes the two subsystems of eco-harmonious subsystem of the tourism sites and the other subsystem presenting the cognation and perception of visitors to the destinations.

通过该研究的归总以期推进研究者和管理者对生态旅游文化构成的探讨,将学术界和非学术界对生态旅游的观点相互结合并促使生态旅游实现真正意义上的可持续发展。

The ecological water area coefficient is determined according to the analysis on the amount of water area in a long time series and comparison with the health situation of the eco-system.

应用该方法对扎龙湿地长序列水面面积数据进行了频率分析,再与湿地生态系统健康状况对照分析,确定生态水面系数,得出湿地生态环境需水量安全阈值。

Based on the researches mentioned above, choosing 18 typical indices, which on behalf of the natural-human pressure (6), ecological states (8), and responses of the human and society (4), using analytic hierarchy process, the author established an estimate system of regional ecological security, worked out a half quantitative compound index number of regional ecological security in Lazi County.

在以上研究的基础上,选取代表自然和人文压力(6个)、生态系统状态(8)和人文社会响应(4个)的共18个典型指标,利用层次分析法建立区域生态安全状况评价体系,半定量计算出拉孜县区域生态安全综合指数。

The theory of "harmonious forest farm" reckons that:①State-owned forest farm is an exoteric complex-system, which is the coupling of forest ecosystem, forestry economic system, and social system in forest farm;②Harmonious forest farm is the farm constructed under the background of socialist market economy and building a moderately prosperous society;③The features of "harmonious forest farm" are the development of production, the prosperity of life and good ecological environment;This farm is a modern state-owned forest farm, the symbols of which are the high value of itself, the good benefits of wokers and the abundance of forest resources;④The key of it is the harmony of farm and society, farm and environment as well as farmitself——that is to say,"harmonious forest farm" should aim to meet the needs of the country and thesociety; forest management should put maintaining and enhancing biodiversity, forest ecosystem health and integrity to the center; inside the forest farm, there should form the mechanism of balancing interests and learning mechanism for sharing at the core of the executive feedback mechanism of forest management, advancing the workers to form a comradely mutual aid relationship.

其要点是:①国有林场是开放的复杂系统,它由森林生态系统、林业经济系统、林场社会系统耦合而成;②和谐林场是在社会主义市场经济和全面建设小康社会背景下建设的林场;③和谐林场是以生产发展、生活富裕、生态良好为特征,以国有林场价值高、林场职工福利好、森林资源丰富为标志的现代国有林场;④和谐林场的关键是要求林场与社会、林场与环境以及林场自身达到和谐,即"和谐林场"必须以满足国家与社会的需求为目的,在森林资源经营上,始终以维持与提高生物多样性、森林生态系统的健康与完整为中心,在林场内部形成以森林经营方案执行反馈机制为核心的利益均衡机制和学习共享机制,促进林场干部职工形成同志式互助关系。

When three kinds of environmental texts are analyzed in the ecocritical perspective,the development of human history is considered to be in concomitance with environmental history.

生态批评研究的多种"环境文本"可以看出,生态批评试图召唤一种阅读语境的根本性转换——从人类唯我独尊的语境转换到一个"地球大生态圈"视阈中的环境语境。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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