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The results showed:①the communities that stipa baicalensis is edificator had the highest species diversity, and the idea that stipa baicalensis communities were the local zone vegetation was supported;②the majority of studied communities were unsaturated in the species diversity, and the species diversity had a tendency to increate with the improvement of soil environment;③the relation of species diversity to community productivity was a one-humped function, that is, the species diversity of mediation productivity was highest;④the species diversity under intermediate disturbance was highest, and the intermediate disturbance hypothesis was supported;⑤the content of potassium in soil had probably an important function, or was an important following factor in the types of grassland community;⑥a new hypothesis on the forming mechanism of species diversity of community, Small Scale Competition and Random-Patch Dynamic Hypothesis, was put forward boldly.

通过上述研究分析得出如下结果：①以贝加尔针茅为建群种的群落物种多样性最高，从物种多样性角度证明该群落类型最适应本区气候和环境条件，应是本区的地带性群落；②绝大多数群落的物种多样性处于未饱和状态，随土壤环境的改善呈明显的增加趋势；③物种多样性与群落生产力呈单峰函数关系，即在中等生产力水平时物种多样性最高；④放牧中等干扰水平物种多样性最高，支持Connell的中度干扰学说；⑤偶然发现土壤钾含量可能在草地植被类型分化中起到重要作用，至少是一个重要的伴随因子；⑥大胆提出了群落物种多样性构成机制的新学说即小尺度竞争随机斑块动态学说。

It electromechanical integration itself is an important component of modern machine technology is an important indicator of the level.

它本身又是机电一体化的重要组成部分，是现代机床技术水平的重要标志。

As the competition is getting fiercer and fiercer, the media all over the world emulatively build their own channel brand. Being the only national news channel, CCTV News Channel represents the highest level of TV news broadcast in China mainland and is an important bridge for China communicating to the world. The brand building of CCTV News Channel will play an important role not only to itself, but also to the development of CCTV.

在电视传媒竞争日益白热化的今天，世界各地的媒体机构都在竞相打造自己的频道品牌，作为中国大陆唯一一个国家级的新闻频道，央视新闻频道可以说代表了大陆电视新闻传播的最高水准，是中国和世界沟通的一个重要桥梁，央视新闻频道的品牌塑造不仅对频道本身乃至对整个央视的发展和影响力都有着举足轻重的作用。

These results suggest that the plasma VEGF level is an important index that shows the damage of function of vascular endotheliocyte, which may participate in the production and development of diabetic nephropathy, above all may play an important role in giving rise to proteinuria.

提示血清VEGF是反映血管内皮细胞功能损伤的重要指标，其在糖尿病肾病的发生、发展，尤其是尿蛋白的形成中起重要作用。

Tianjin, one of the four municipalities directly under the Central Government, is the door of Beijing, capital of China. In 1997, the State Council described her as the economic center of the Bohai-Sea-Ring area, as well as an important economic center of northern China. This function description has the following meanings: on the one hand, the development of Tianjin must eradiate the Bohai-Sea-Ring area, the north of China and even the whole nation; on the other hand, it requests Tianjin to step up to a higher position, function and influence in multinational regional cooperation, and hence to form an important base and green channel on economy cooperation in northern China.

天津作为中国四大直辖市之一，是首都北京的门户。1997年国务院将其定位为环渤海的经济中心和我国北方重要的经济中心，这一功能定位意味着：一方面要求天津的发展要辐射于环渤海地区，辐射于我国北方地区乃至辐射于全国；另一方面要求提升天津在跨国区域合作中的地位、作用和影响，形成中国北方对外经济合作的重要基地和绿色通道。

Mud crab Scylla serrata is an important economy aquaculture animal living in estuarial waters. Environmental temperature often changes abruptly, so study on biochemical components is important to understand organism adaptation to environment.

锯缘青蟹是生活在河口海区的一种重要经济甲壳动物，其生活的环境温度经常发生温度的骤然增高或降低。

Xylose isomerase plays an important role in industrial ethanal fuel production from lignocellulosic biomass, thus the study on its conformation, function and site-directed mutagenesis is of important prospect and wide attention.

木糖异构在由植物纤维生产酒精工业中扮演著重要角色，对其结构和功能及其改造研究受到广泛重视，具有重要应用前景。

Xylose isomeraseplays an important role in industrial ethanal fuel production from lignocellulosic biomass,thus the study on its conformation,function and site-directed mutagenesis is of important prospect and wide attention.

木糖异构酶在由植物纤维生产酒精工业中扮演着重要角色，对其结构和功能及其改造研究受到广泛重视，具有重要应用前景。

Then, interruptible load is introduced into transmission congestion management in the paper. The paper discusses the application of interruptible load to transmission congestion management in power pool market. Market risk of evade is very important in transmission congestion management. The FGR, FTR, TO are introduced into transmission congestion management, its concept and implement in bilateral market are discussed in the paper. It provides the valid means of evadable price risk for the market participant. The reasonable allocation of congestion cost is very important in transmission congestion management. The paper proposed a novel methodology for allocation of congestion cost based on the line flow analysis.

然后，将可中断负荷引入到输电阻塞管理中，对其在电力联营体交易市场模式下输电阻塞管理中的应用进行了全面阐述；市场风险的规避是输电阻塞管理中需要考虑的重要内容，本文将基于潮流的输电权、金融型输电权及输电期权引入到输电阻塞管理中，阐述了其基本概念以及在双边交易市场模式下的具体实施，为市场参与者提供了规避价格风险的有效手段；阻塞费用的合理分摊是输电阻塞管理中的重要内容，本文提出了一种基于阻塞线路潮流组成分析的阻塞费用分摊新方法。

With the continuous lucidity of Chinese condition, America and Britain which have had the important business interests were faced to adjust their China's trade policies. The period from 1949 to 1954 is an important era for the history of the relationship of America, Britain and China. In this period, their trade policies have gone through a flexuous course.

随着中国革命的胜利，美英这两个在华有着传统商业利益的国家，其优势地位受到挑战，对华贸易政策也面临着调整。1949-1954年是美英中三国关系史上一个较为重要的时期，在这一时期，美英对华贸易政策经历了一段曲折的历程。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了