首位

The team leader of national mountain-climbing group of the mobile commander in chief that carries this machine to ascend a top king brave peak, wang Qiuyang becomes the team member of team of amateur of; of Alpinist of the Han nationality that also becomes global first place twice to ascend a Mount Everest at the same time to conquer successfully for the first place world " is triode the Chinese female of ".

携带该机器登顶的活动总指挥的国家登山队队长王勇峰，也同时成为全球首位两次登顶珠峰的汉族登山家；业余队队员王秋扬则成为首位成功征服世界"三极"的中国女性。

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

About 1781 cases recently suffering from acute upper gastrointestinal bleeding were divided according to their ages into 3 groups and analysed. In the old-aged group the causative diseases were arranged in order of incidence as follows, gastric cancer, gastritis and gastric ulcer. Gastritis, duodenitis and duodenal ulcer were in the order of incidence in the middle-aged group.

本文总结 1，781例近期内有上消化道大出血的内窥镜检查资料，并按不同年龄组进行对比，发现老年组以胃癌出血占首位，胃炎其次，胃溃疡为第三位；中年组胃炎出血占首位，依次为十二指肠溃疡、胃溃疡；青年组以胃炎占首位，依次为十二指肠溃疡、十二指肠炎。

Results Resent three month, out of energy and vague aching in the loins and legs respectively are the first physical symptoms for male and female; Hypomnesis is the first psychology symptom for both of them.

结果 近3个月来，曾有的躯体症状中男性和女性占首位的分别为精力不支（29.04％），腰酸腿疼（31.78％）；曾有的心理症状中男性和女性占首位的均为记忆力减退（37.26％。41.01％）；广义线性回归模型分析表明，身心症状得分与睡眠状况有关系。

Synthesizing some study fruits of population migration and different research methods, it also brings forward a interdisciplinary theory perspective for the study of migration behavior from such four levels as the conception hypothesis, inchoation, context and time dimension of migration behavior.

社会理论中，理解的功能是回答为什么存在这样一种关系的问题。充分的理解需要整合不同的分析层次。关于分析层次，林得伯格[2]-[3]提出了学科的&分析首位&的概念：理论首位和分析首位。他认为，在社会学和微观经济学中，分析首位在宏观层次，而理论首位在微观层次。

Her theory that this signalled the advent of a misogynistic climate has been challenged by some critics, who point out that the period saw the first female evening network-news anchor, Harvard's first female president and America's first female secretary of state.

她认为这种现象标明了嫌忌女性这种大气候的出现，而这个观点受到了某些批评家的反对。他们指出，时代见证了我们的首位女性晚间新闻主持者、哈佛的首位女校长，以及美国的首位女国务卿。

The team leader of national mountain-climbing group of the mobile commander in chief that carries this machine to ascend a top king brave peak, wang Qiuyang becomes the team member of team of amateur of; of Alpinist of the Han nationality that also becomes global first place twice to ascend a Mount Everest at the same time to conquer successfully for the first place world " is triode the Chinese female of ".

携带该机器登顶的活动总指挥的国家登山队队长王勇峰，也同时成为全球首位两次登顶珠峰的汉族登山家；业余队队员王秋扬则成为首位成功征服世界&三极&的中国女性。

He was the first vice-embassador and the first embassador of staying Germany in Qing Dynasty.

刘锡鸿是中国近代史上首位驻外副使，同时也是首位驻德公使。

The thesis also analyzes the reasons which lead to this evolution, hoping to abundance urban system research .At first, The thesis uses Primate City Index and Parameter to figure out citys scale distribution in Fujian province.

本文先用首位度分析方法和分形理论对全省城镇规模的分布特征和变化趋势进行了分析，结果显示福建省城镇规模分布基本上属于位序规模分布，但是首位度有增大的趋势。

Bo Guagua, the son of Bo Xilai, secretary of the CPC Chongqing Municipal Committee, received the Big Ben Award for Top 10 Outstanding Chinese Young Persons in the UK Saturday, China News reported. The 22-year-old is said to be the first Chinese mainland student to study at Harrow School and enter Oxford's Balliol College on a full scholarship.

据中新社报道，2009&大本钟奖&英国十大杰出华人青年评选9日揭晓，重庆市委书记薄熙来之子薄瓜瓜入选。22岁的薄瓜瓜曾是英国著名的哈罗公学首位大陆学生，后来获得全额奖学金进入牛津大学，成为巴利澳尔学院的首位大陆学生。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。