查询词典 decrease in population

Entire county area 2, 853 square kilometer, its intertill ground accumulates 1.08 million mus, population 600 thousand, population of course of study of its middle peasant 510 thousand, 21 villages and towns, 341 administrative village.

辽阳县位于辽宁省中部，东连本溪，南依鞍山，西邻辽中县，北接辽阳市。全县面积2，853平方公里，其中耕地面积108万亩，人口60万，其中农业人口51万，21个乡镇，341个行政村。

Bidens pilosa var. radiata, one of the rapid expanding invasive weeds, has become prevailing throughout Taiwan. A study on the result enhanced by the breakdown of geographic isolation with the native varieties in genetic variation, population structure and introgressive hybrization is really in need. In this study the genetic variation and population structure among the varieties of Bidens pilosa complex were studied using ISSR markers.

在台湾Bidens pilosa种群在外部形态及分布上均非常类似，加上大花咸丰草又属极具侵略性的新归化种，在与其他自生变种又无明显隔离下，是否增加种间之交流与渐渗杂交之机会及对族群结构的影响，实有深入探讨之必要。

The results showed that :(1) sex ratio of Macaca mulatta population in Neilingding Island was 1∶ 0.98 , in which infancy group was 1∶1.07 , juvenescent group was 1∶0.93 , middle age group was 1∶0.6, middle-old age group was 1∶0.57 , old age group was 1∶1.14 ;(2) age composition pattern of Macaca mulatta population in Neilingdi...

结果表明：( 1 )内伶仃岛猕猴种群雌雄性比为 1∶ 0 。98，各年龄组性比幼年组为 1∶ 1 。0 7，青年组为 1∶ 0 。93，中壮年组为 1∶ 0 。6 ，中老年组为 1∶ 0 。5 7，老年组为 1∶ 1 。1 4 ；( 2 )列出了猕猴种群年龄结构图，确定了年增长率为 6 。9%，种群数量的动态公式是 Nt=2 0 0 e0 。0 69t；( 3)预测了未来 1 0 a的猕猴种群的数量和发展，种群数量从 2 0 0 1年到 2 0 1 0年增长到 1 2 0 0头左右；( 4 )内伶仃岛猕猴种群发展的最适容纳量为 90 0～ 1 1 0 0头(平均 1 0 0 0头)。

Generally, the increase of central city population is much faster and more lapsable than which of the region. The purpose of this paper is to establish a model of the population relationship between the region and its central...

因此，笔者试图构建中心城市人口与区域人口数量关系模型，以预测区域人口去推导中心城市人口，并在此基础上进一步研究在区域人口和城镇化水平趋于稳定状态下的稳定态城市规模。

On the sampling scale of 20 m, the road effects on different dominant populations were demonstrated in their spatial distribution patterns. There were significant increases in the biomass of Schima superba population, the number of individuals and biomass of Litsea rotundifolia population (P.05) along the parallel direction to road, respectively, while those of other populations had no significant difference.

优势物种20 m取样尺度的空间分布格局反映了不同种群对旅游路径干扰的不同响应，其中荷木的生物量、豺皮樟的个体数和生物量在远离旅游路径方向上均呈显著增长趋势，其他物种的个体数和生物量变化不显著。

Bone marrow-derived mesenchymal stem cells are a population of cells capable of replicating as undifferentiated cells and that have the potential to differentiate to lineages of mesoblastic origin. And the characters of BMSCs have suggested the great value of this specific cell population for tissue engineering.

骨髓间充质干细胞具有自我复制、未分化的特点，并可在不同条件下分化为中胚层起源的多种细胞，这些特点决定了其在组织工程中的重要地位。

In addition to this main pathway, howeer, ECs also can be generated from the EGFR-2–PDGFR-+ single-positie population, which represents the paraxial mesodermal lineage and is also deried from the DP population.

除这条主要途径外，内皮细胞也可从EGFR-2+PDGFR-+单阳性群体中得到，这种单阳性群体在近中胚层出现，并也来自于双阳性群。

The reason is that the population of the ground state descends and the population of the first-excited state increases in the two-color coherent lase relative that in the monochromic laser and the transition channel of the electron to the even-parity continuum

氦离子在添加倍频光的双色场作用下高次谐波产生效率极大提高的原因是：倍频光极大地加快了电子电离到连续态及返回基态这一过程，使辐射出的高次谐波光子数大大增加，该初步阐释可为高次谐波真正应用到实际中提供一些理论启示。

The topology of NJ tree indicated that local population of wild boar are polyphyletic, and individuals from same local population are not monophyletic, and low confidence level was obtained.

根据共享等位基因距离构建的个体水平系统发生树也表明，中国大陆地区野猪的系统发生是复系发生，同一地方种群没有出现明显的单系群；系统发生树各分支长度几乎相等，未得到高的置信度支持。

Percent and 21. 4 percent respectively. F1 plants of R01 self-cross also present diverse colors such as white, pink, red, nacarat/saffron, dark yellow, yellow and so on, And the pink and the nacarat/saffron plants have the highest proportions, 50.6 percent and 31. 4 percent, respectively. The wide segregation chromatogram of self-cross progeny implies that these two varieties themselves contain the abundant genetic polymorphism. The ISSR genetic diversity analysis and the principle factor analysis were performed using 49 plants of RP1 self-cross progeny population and 123 plants of R01 self-cross progeny population.

RP1及R01的遗传多样性最高，这从自交一代的表观性状及ISSR的遗传变异可以得到证实，如RP1自交，F1代花色有白色、粉色、玫瑰红、深红色、桔红/桔黄、黄色，黄红复色等，其中以粉色及桔红/桔黄色占的比例最大（分别占61.2％，21.4％）；R01自交，Fl代花色有白色、粉色、红色、桔红//桔黄、深黄色，黄色，其中以粉色及桔红/桔黄色占的比例最大（分别占50.6％，31.4％），较广的自交分离色谱，表明两个品系自身存在丰富的遗传多态性。

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！