查询词典 ecosystem

The research results showed: spruce-fir mixed uneven-aged ecosystem managed in intensive method, its productive power and dominance were developed, the economic needs were met, environment and social effect were assured, so sustainable management of stands-level forest ecosystem were realized.

结果表明，经过集约经营的云冷杉针阔混交林，其生态系统生产力和优势得以最充分的发挥，既满足经济产出的要求，又保证了生态环境和社会效益，从而实现了林分级别上森林生态系统的可持续经营。

Based on stands-level forest ecosystem, referring intensive management method of natural mixed uneven-aged stands—control method, the mixed stands of coniferous and broad-leaved trees, in which spruce and fir are dominant species, were studied in this thesis;and explored sustainable management model on forest ecosystem level about economy, ecological environment and society.

本文以林分级别森林生态系统为基础，借鉴了天然异龄林集约经营方法—检查法，对长白山过伐林区以云冷杉为主的针阔混交林的森林可持续经营进行了研究，并从经济、生态环境和社会3个方面探索了森林生态系统尺度上的可持续经营模式。

It consists of double meaning: one is the land ecosystem self-security, another is land ecosystem security to human.

它包括两层基本涵义，一层涵义是土地生态系统自身的安全；第二层涵义是土地生态系统对人类的安全。

The water and heat balance of desert ecosystem is a key point of climate and micro-climate formation and its changing mechanism, and it is important to keep the current ecosystems steady and to recover the retrograde ecosystems, especially desert ecosystem.

荒漠生态系统水热平衡问题是研究气候和小气候形成及其变化机制的重要问题，也是维持现有生态系统平衡稳定以及退化生态系统恢复的关键，而且对防治荒漠化起着重要作用。

Neral contracts enterprises with indistinct and synthetical judgment method, analyze the main work of the general contracts enterprises with the theory of PAEI; the developing stage, build the value sharing chain of general contracts enterprises, and value sharing system, bring forward that the general contract enterprises must pay attention to develop the core value chain and the no core value chain; the leading stage, introduce the key competitiveness of the business ecosystem, analyze general contracts enterprises'the value of core value chain and enhance the key competitiveness of enterprises; the renewal stage, analyze update mode of business ecosystem and development trend of general contracts enterprises.

开拓阶段，以模糊综合评价法来选择总承包企业的伙伴企业，并且以PAEI理论分析了此阶段工程总成承包企业的工作重点；发展阶段，构建了工程总承包企业的价值共享树，建立价值共享体系，并且提出总承包企业要注意发展核心价值链和非核心价值链；领导阶段，介绍了商业生态系统的核心竞争力，对总承包企业的核心价值链进行价值分析，提高企业的核心竞争力；更新阶段，分析商业生态系统的更新方式和工程总承包的发展趋势。

With an emphasis on the establishment of the coastal ecosystem safety indicator system,this paper applies the conceptual model of Driving force-State-Response to build up the framework of the coastal ecosystem safety indicator system,based on China's coastal condition,through the foll...

本文以构建海岸带生态安全指标体系为研究目的，通过整体性与海陆结合、敏感性与脆弱生态系统、科学性与可操作性的指标选取原则，采用&压力状态响应&概念模型，结合我国目前海岸带面临的生态环境问题，提出符合我国的海岸带生态安全指标体系的基本框架。

At 8 km distance the ecosystem began to approximate an undisturbed ecosystem where only slight changes in the understorey vegetation were observed.

在8公里距离生态系开始接近未受干扰的生态系，在understorey植被上的仅轻微的变化被观察。

This is a serious warning for China's ecosystem crisis.

这是对中国生态危机发出的严重警告。

From the discussions above, it is important that sustainable development agro-ecosystem should be promoted in Aba.

并以此为据，提出了促进阿坝州农业生态系统可持续发展的几点建议。

The land is material base of humanity's livelihood,it is the national economy and the social development of precious resources and the important element of production, but land resource's of abusiveness and abuses phenomenon to be serious, at present it is facing serious challenges about the land ecosystem to destroy and humanity living environment pollution and so on.

摘 要：土地是人类赖以生存的物质基础，是国民经济与社会发展的宝贵资源和重要生产要素，但土地资源的滥用和乱用现象严重，目前正面临着土地生态系统破坏、人类生存环境污染等问题的严峻挑战。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48