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The spatial-temporal distribution of NPP along NECT and its response to climatic change were also analyzed. Results showed that the change tendency of NPP spatial distribution in NECT is quite similar to that of precipitation and their spatial correlation coefficient is up to 0.84 (P 0.01). The inter-annual variation of NPP in NECT is mainly affected by the change of the aestival NPP every year, which accounts for 67.6% of the inter-annual increase in NPP and their spatial correlation coefficient is 0.95 (P 0.01). The NPP in NECT is mainly cumulated between May and September, which accounts for 89.8% of the annual NPP. The NPP in summer accounts for 65.9% of the annual NPP and is the lowest in winter. Recent climate changes have enhanced plant growth in NECT. The mean NPP increased 14.3% from 1980s to 1990s. The inter-annual linear trend of NPP is 4.6 gC·m-2·a-1, and the relative trend is 1.17%, which owns mainly to the increasing temperature.
结果表明:(1)NECT样带植被NPP的空间变化趋势同降水量的空间变化十分相似,由东到西逐渐降低,二者在空间上的相关性达到了0.84(P《0.01),说明NECT样带的植被NPP在空间分布上主要受水分趋动;(2)NECT样带植被NPP的年际变化主要是由各年份夏季NPP的变化造成的,夏季对NECT样带植被NPP的年际增长贡献率最大(67.6%),二者之间的相关性达到了0.95(P《0.01);(3)NECT样带的植被NPP积累期主要发生在5-9月份,这5个月的NPP占了全年NPP总量的89.8%,整个夏季(6-8月份)的NPP占了全年的65.9%,冬季(12-2月份)的NPP最低,基本为0;(4)近19年来的气候变化促进了NECT样带的植被生长,从1980年代到1990年代,NPP显著增加,年代际相对增长率为14.3%,平均年际绝对增长趋势为4.6 gCm-2(a-1,相对增长趋势为1.17%,这主要是由温度升高引起的。
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The UN General Assembly proclaimed 2004 as the celebratory year to mark the bicentenary of the Haitian Revolution, which led to the establishment of the first black republic in the Western hemisphere, and, by extension, to the liberation of the peoples of the Caribbean and Latin America from slavery.
联大将2004年定为"反对和废除奴隶制国际纪念年",以纪念海地革命胜利200周年。这次革命的结果是,西半球建立了第一个黑人共和国,并促使整个加勒比和拉丁美洲地区的人们展开了反对奴隶制的解放斗争。
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In order to produce high quality red Fuji apple with good surface quality,10 year-old red Fuji apple (Changfu 2)trees by pot culture were used in this trial in order to study the relationship of microenvironment and the apple surface cataclasm by the methods of shading and spraying during the fruit growth period from 2006 to 2007 in the nursery of Green Graden Ltd.of Agriculture University of Hebei.
为了生产优质果,提高红富士苹果外观品质,于2006~2007年在河北农业大学绿美园林有限公司苗圃以10a生盆栽红富士苹果为试材,品种为长富2,分别采取在果实发育期搭遮荫网适当遮荫、高温时间喷水降温等处理措施,研究了果实微域环境温湿度与红富士苹果果面碎裂发生的关系。
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I do not dare to face up to at present own, but what have I been such am defeated I to remind oneself come the university the goal am frequently the near year learn from me to achieve my goal?
我不敢正视眼前的自己,我是那么的失败我常常提醒自己来大学的目的是什么可是近一年的学习我达到我的目的了吗?
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The author investigated the community of grasshoppers in Changbai Mountain area during the period of July to September 2001, complementally collected specimen and systematically collected and measured environmental factors from July to October in the following year, and consulted to specimen collected by Fengling Zhang and Yanlong-yang in 1979, 1980 and 1981. By analyzing and classifying the data of five years, the author analyzed the community construction and ecological adaptability of the grasshoppers in the area. The main aspects dealing with the grasshoppers are as follows:(1)the community construction and faunal geographical elements;(2)characteristics of their ecological distribution;(3)vertical distribution of grasshoppers in the northern slop;(4)the relationship between environmental factors and differences in shape of grasshoppers in different vertical belt of northern slop, etc.
本文作者于2001年7~9月间系统地调查了长白山地区的蝗虫,并于2002年的7月到10月间对标本进行了补充采集,并对环境因子数据进行了系统的测量和收集,同时参考张凤岭、杨彦龙先生1979、1980和1981三年采集的标本,通过对标本的鉴定和整理,采用五年的野外工作数据,对长白山地区蝗虫群落结构及生态适应特性进行了研究,主要研究内容包括:蝗虫的群落结构及区系地理成分;蝗虫生态分布特点;保护区北坡蝗虫垂直分布及不同垂直带内蝗虫的形态差异和环境因子之间的关系等方面内容。
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Experts pointed out that real estate development cycle is normally 2 to 3 years, this year to root, double the money supply shrink, projects to be reduced, but to go to from 2006 to 2007 will reflect the , and one two years ago started the housing project did not have much impact by regulation Mangshan downtime too.
专家指出,房地产开发周期一般是2至3年,今年的根源,双收缩货币供应,项目将减少,但到2006至2007年将反映,一两几年前开始的住房项目并没有产生多大影响的调控邙停工了。
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Real estate development cycle is normally 2 to 3 years, this year to root, double the money supply shrink, projects to be reduced, but to go to from 2006 to 2007 will be reflected, and one housing project started two years ago did not have much control by the impact of downtime.
房地产开发周期一般是2至3年,今年的根源,双收缩货币供应,项目将减少,但到2006年至2007年将反映,一个住房项目开始两年以前没有太多的控制所产生的影响停机。
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In order to explore solutions to the problem, so the sample students learn to socialist modernization, and further Xuexi Suobi Xu of algebraic, geometric probability and basic knowledge and a rudimentary micro-integration, and forms the basic skills; further developing of thought Nengli , computing power, spatial imagination, the ability to solve practical problems and sense of innovation, from last year, to understand the science ...
为了探索解决问题的办法,使学生在高中阶段学好从事社会主义现代化建设和进一步学习所必需的代数、几何基础知识以及概率统计和微积分的初步知识,并形成基本技能;进一步培养学生的思维能力、运算能力、空间想象能力、解决实际问题的能力和创新意识,从去年起,为了解学。。。本文共有6999字
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The result shows that desertification is serious in the study area. Various types of desertification land add up to 370000hm~2, accounting for 39% of the total land. From l995 to 2000,the serious desertification land, where vegetation cover is below 30%, extends with the speed of 61hm~2 per year. The increasing landscape fragment reflects the intense intervene that human activities act on landscape. Shape index changes indicate the growing ratio of interior -edge, which is disadvantageous to natural recover of land.
结果表明,研究地区沙漠化现象严重,各种类型沙漠化土地总面积37万hm~2占总土地面积的39%;植被盖度小于 30%的较严重的沙漠化土地从1995年到2000年的五年间以61hm~2/年的速度扩展;景观破碎度变大,反映出人类活动对景观的干预作用不断增强;沙漠化景观要素的形状指数变化表现出内、缘比变大,不利于沙漠化土地的自然恢复。
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For this year's Lenten Message, I wish to spend some time reflecting on the practice of almsgiving, which represents a specific way to assist those in need and, at the same time, an exercise in self-denial to free us from attachment to worldly goods.
今年的四旬期文告,我愿用一点时间来反省"施与"这件事,它代表一种帮助贫困者的方式,同时也是一种克己牺牲的操练,我们自己摆脱对世俗财物的依恋。
- 推荐网络例句
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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。
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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。
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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.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力