(1)"Water pollution" means the introduction into a water body of any substance which alters the chemical, physical, biological or radioactive properties of the water in such a way as to affect its effective use, endanger human health, damage the ecosystem or deteriorate the water quality.

(一)"水污染"是指水体因某种物质的介入，而导致其化学、物理、生物或者放射性等方面特性的改变，从而影响水的有效利用，危害人体健康或者破坏生态环境，造成水质恶化的现象。

属类：法学专业-中国法律-水污染防治法

A native (indigenous)species is one that occurs in a particular region, ecosystem , and habitat without direct or indirect human actions.

本土(土生土长)种类就是在没有直接或间接人类活动的情况下，在一特定地区、生态系统和栖息地自然就有的种类。

属类：行业术语-检验检疫-

Evaluation of Ecosystem Services in Bifengxia Scenic Spots

碧峰峡景区生态系统服务及其价值评价

属类：行业术语-中文论文标题-

Study on the Carbon Storage and Distribution of Pinus massoniana Lamb Plantation Ecosystem at Different Growing Stages

不同发育阶段马尾松人工林生态系统碳贮量研究

属类：行业术语-中文论文标题-

Research Progress on Evaluating the Ecosystem Services of Grassland

草地生态系统服务价值的研究进展

属类：行业术语-中文论文标题-

Assessment of Ecosystem Integrity in Headwaters of Yangtze River

长江源区生态系统完整性测量与评价

属类：行业术语-中文论文标题-

Primary Studies on Urban Ecosystem Health Assessment

城市生态系统健康评价初探

属类：行业术语-中文论文标题-

Classification, Ecosystem Service, Protection and Utilization of the Urban Ecological Land-A Case Study of Liaocheng City

城市生态用地分类、功能及其保护利用研究―以山东聊城市为例

属类：行业术语-中文论文标题-

Carbon Storage and Carbon Fixation during the Succession of Natural Vegetation in Wetland Ecosystem on East Beach of Chongming Island

崇明东滩湿地自然植被演替过程中储碳及固碳功能变化

属类：行业术语-中文论文标题-

Effects of Ozone Pollution on Terrestrial Ecosystem Productivity

臭氧污染与陆地生态系统生产力

属类：行业术语-中文论文标题-

Viewing Police Public Relations (PR)from Social Ecosystem of Police Organizations

从警察组织生态看警察公共关系

属类：行业术语-中文论文标题-

We will enhance harmony between man and nature to push the whole society onto a path to civilized development featuring the growth of production, an affluent life and a sound ecosystem .

促进人与自然的和谐,推动整个社会走上生产发展、生活富裕、生态良好的文明发展道路。

属类：时事政治-政府文告-16大报告

But there is a real danger facing this important ecosystem

但是这个重要的生态系统正面临着严重威胁。

属类：综合句库--

Regional ecosystem types, such as grass land, desert, and deciduous forest, are called biomes

地区的生态系统，例如草原、荒漠和落叶林又被称为生物带。

属类：综合句库--

Energy Analysis of the agro-ecosystem in the Northeast of China

东北地区农业生态系统的能值分析

属类：行业术语-中文论文标题-

An Analysis of the Value of Changchun Green Field Ecosystem Services

对长春市绿地生态系统服务价值的探讨分析

属类：行业术语-中文论文标题-

second, completing 200 nature reserve projects in the types of forest, desertified land and wetland ecosystem , 32 wetland conservation and comprehensive utilization demonstration projects and 50,000 nature reserve districts

二是建成200个典型的森林、湿地和荒漠生态系统类型自然保护区项目，32个湿地保护和合理利用示范项目，5万个自然保护小区

属类：综合句库--

Acidic Deposition in Fu-Shan Forest Ecosystem

福山森林生态系之大气酸沉降

属类：行业术语-中文论文标题-

International Expert Meeting on the Rehabilitation of Degraded Forest Ecosystem

复兴退化森林生态系统国际专家会议

属类：科技术语--

Eutrophication: Gradual increase in the concentration of phosphorus, nitrogen, and other plant nutrients in an aging aquatic ecosystem such as a lake.

富营养化:即优养化。在逐渐成长的水体生态系统(例如湖泊)中，磷、氮和其它植物营养物质浓度逐渐增加的过程。

属类：行业术语-环境-

Drought Impacts on Terrestrial Ecosystem Productivity

干旱对陆地生态系统生产力的影响

属类：行业术语-中文论文标题-

Upon the completion of the program, the forest cover will reach 19.44 percent, a rise of 8.27 percentage points, and the ecosystem in Beijing, Tianjin and surrounding areas will be improved considerably

工程建成后，森林覆盖率将达到19.44%，增加8.27个百分点，京津地区的生态将大为改观。

属类：综合句库--

On the Sources of Soil CO2 Flux of Guandaushi Forest Ecosystem

关刀溪森林生态系土壤二氧化碳释放来源之探讨

属类：行业术语-中文论文标题-

Ecosystem Services and Ecological Valuation of the forest-fruit-grass-fish Ecosystem in Hilly Region, Heshan, Guangdong, China

广东鹤山林-果-草-鱼复合生态系统生态服务功能价值评估

属类：行业术语-中文论文标题-

Microorganisms have usually been neglected in studying stream ecosystem although they are just as important as other larger living organisms from the ecological point of view.

过往的溪流考察,微生物通常都被忽略;但从生态学的观点来看,微生物在自然界的角度是和其它生物同等重要。

属类：应用文体-科研守则-

CO2 Emission and Fixation in Paddy Ecosystem during Late Rice Growing Season in Red Soil Hilly Region

红壤丘陵区晚稻生长期间CO2的排放与固定规律

属类：行业术语-中文论文标题-

energy Analysis of Planting Economic Ecosystem in Intensive Agricultural Region of North China Plain: A Case Study in Cangzhou of Hebei Province

华北平原集约农区种植业生态经济系统的能值分析-以河北沧州为例

属类：行业术语-中文论文标题-

Eco-environmental Problemes Lie Ahead of the Yellow River Delta Wetland Ecosystem and Their Control Countermeasures

黄河三角洲湿地生态环境质量现状及保护对策

属类：行业术语-中文论文标题-

Draw a sketch map of the area in which you have worked. Indicate flow direction, breadth, exposed rocks and positions of the trees which are related to the ecosystem .

绘画一幅研究范围的简图,图中包括水流方向、露出水面的石块、阴影盖着研究范围的树木及其它可能有关的资料。

属类：应用文体-科研守则-

Nitrogen Uptake by Rice Paddy Ecosystem Based on Rice Straw Incorporation

基于稻草还田的稻田生态系统N素吸收特性研究

属类：行业术语-中文论文标题-