水是维持生态系统良性循环的根本。
Water is essential for keeping the circulation of ecosystem.
北部森林需要火来维持生态系统，所以夏季经常发生森林大火。
The boreal forest needs fire to maintain the ecosystem, and large fires happen regularly in the summer.
土地利用政策评价在保护、维持生态系统服务功能价值方面起到了积极的作用。
The expansion of cities, towns and roads were the main causes of the values' decrease. Despite this aspect, the land-use policies are positive in protection and maintain the balance of ecosystem.
文章探讨了维持生态系统平衡所需的水量，包括河湖水生生物生存的最小需水量；
The paper discusses the water demand volume for ecologic system equilibrium including the minimum water demand volume for water living things in lake and river;
我们参与反核活动，保护动物，以及维持和保护我们的生态系统。
We're involved in anti-nuclear activity, conservation and protection of animals and protection and support of our eco-system.
这些残骸能够维持十年，构建出一个生态系统，将鲸的沉尸作为深海生物的一片“绿洲”。
The remains (残骸) can last (持续) for ten years and build an ecosystem called a whale fall an "oasis (绿洲) " of life in the deep sea.
没有水，我们就不能种植我们所吃的食物，不能维持我们的生命或生态系统。
Without water, we would not be able to grow the food we eat, to sustain ourselves or the ecosystem.
不可否认，动物在维持地球生态系统的微妙平衡上起到了重要作用。
It is an undeniable fact that animals play a vital role in maintaining the subtle balance of the earth's ecological system.
如果说生态系统是在维持的话，那么共同进化则是在学习。
另一个教训是，为维持平衡，生态系统“顶点”的大鱼可能象小鱼一样重要。
Another is that, to maintain a balance, big "apex" fish may be as important as small.
关于这个问题的辩论在局部和全球范围两个层面上同时展开：生态系统的一小部分可以小到何种程度仍能维持其完整、丰富的功能，从而可以认为是受到了保护呢？
The discussion is taking place at both the local and global levels How small can a fragment of an ecosystem be and still function in all its richness and thus be considered preserved?
因此北太平洋海獭的近乎绝灭，导致了海胆的大量繁殖，海胆随后毁掉了迄今维持着自身生态系统的巨藻林。
Thus the near extinction of sea otters in the northern Pacific led to a proliferation of sea urchins, which then laid waste an entire kelp forest that had hitherto sustained its own ecosystem.
这使珊瑚礁对于维持健康的海洋生态系统至关重要，而全球有超过十亿人要依靠海洋提供食物。
This makes them crucial in supporting a healthy marine ecosystem upon which more than 1bn people depend for food.
而现在IBM公开与Oracle站在一边，后者维持此生态系统的任务变得简单得多。
With IBM now publicly on the same page as Oracle, the latter's task of preserving the ecosystem becomes far, far easier.
谷歌之所以维持了这样一个Android生态系统，让各厂家都参与进来，并且努力防止它真正走向分崩离析，其原因就是这些严格的规程。
These rigorous procedures is the reason it holds the Android ecosystem together and prevents it from truly fragmenting.
很不幸地，一般民众却不了解鲨鱼是海洋中必需的生物，因为鲨鱼能维持水中生态系统的平衡，不过，牠们现在却面临绝种的命运。
Unfortunately, the general population fails to see that sharks are a vital component of our oceans because they maintain balance in our underwater ecosystem and, now they are facing extinction.
世界是一个复合的生态系统，各要素之间相互联系，相互作用，维持着整个世界的和谐。
The world is a compound ecological system, with each main factor mutually contacting and interacting to maintain the harmony of world.
在大自然中，就是因为有着各式各样的微生物，发挥着不同的效用，透过生物食物链的机制才能使得我们的生态系统维持平衡。
In nature, there exists many types of microbes and each plays a role in balancing our entire ecosystem through the activity of the biological food web.
物种丰富的绿地对于维持工业区绿地系统稳定、发挥绿地功能、维护工业区生态系统健康上发挥着极其重要的作用。
Greenland with abundant species play the key role of maintain Greenland system stabilization, exert it's function and keep ecosystem health in industrial region.
它是满足基本人类需要，健康、粮食生产、能源和维持区域和全球生态系统所必不可少的。
It is essential for satisfying basic human needs, health, food production, energy and maintenance of regional and global ecosystems.
目前很多人熟悉到绿道的功能远不止美化和游憩，绿道还能帮助维持受威胁的生态系统。
Greenways are now seen by many as more than amenities for beautification and recreation. They can also help sustain threatened ecosystems.
保护生态系统，保护物种将有助于维持自然界的平衡，而这样的平衡已经被近年来的人类活动打破。
Conservation of ecosystems and the species within them could help to maintain the natural balances disrupted by recent human activity.
内陆水体生态系统在维持全球物质循环和水分循环中具有重要作用。
The terrestrial aquatic ecosystems play an important role in sustaining global matter and water cycle.
森林资源可持续性是森林生态系统满足人类需求的支撑能力和维持能力的综合体现。
The sustainability of forest resources reflects the sustained and maintainable capacity of forest ecosystem meeting the demand of mankind.
在农业生态系统中，土壤微生物通过降解植物残体为植物提供营养，同时维持植物生产所需的土壤性质。
In agricultural ecosystem, they supply nutrients for crops with degraded plant residues and keep soil characteristics which are necessary to plant growth.
土壤是维持陆地生态系统功能和持续性的至关重要的有限资源。
Soil is a vital and finite resource on earth critical to maintenance of the functions and sustainability of the terrestrial ecosystem.
城市自然保留地作为城市中残存的自然生态系统，是维持乡土物种生存的最后生境，其保护具有极其重要的意义。
As the natural ecosystem, urban natural reserved area is the last habitat for indigenous species, which is different from natural conservation and urban greening.
结合生态学及信息生态学的相关理论，探讨信息生态系统平衡的实现机制、维持机制和恢复机制。
Combining relevant theories of ecology and information ecology, the authors probe into the realizing mechanism, maintaining mechanism and resuming mechanism of information ecological equilibrium.
水生植物腐烂分解作为湖泊生态系统物质循环以及能量流动的关键环节，是维持湖泊生态系统功能的主要过程之一。
As a key aspect of material cycle and energy flow of lake ecosystem, decomposition of lake aquatic plants is one of the main process of maintaining the lake ecosystem functions.
湿地水鸟是湿地生态系统的重要组成部分，对维持湿地生态系统起着举足轻重的作用。
Water birds on the wetland are an important component of the wetland ecosystem, playing a very important role in maintaining the wetland ecosystem.
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