查询词典 abundance ratio

In two NIH-funded studies published this week in the journal Nature, the scientists report that the relative abundance or ratio of two of the most common groups of gut bacteria is altered in both obese humans and mice.

在两个全国卫生研究所资助的研究报告发表在本周的Nature杂志上，科学家报告说，相对丰度或比例的两种最常见的群体的肠道细菌是变造的，在双方肥胖人类和老鼠。

Nature, most elements have two or more isotopes, the same kinds of elements in the quality of the various isotopes of different, but the types and proportion constant (except for radioactive elements). In 1961, the carbon content of the most abundant in nature, a kind of isotope, carbon-12 atom of a quantity and quality of C as a 12 mass units to it as "benchmarks" for all isotopes of an element according to the average abundance The ratio of the benchmark is the atomic weight of this non-prime, that is listed in the periodic table of atomic weights.

自然界中大多数元素都有两种或更多的同位素，同种元素的各同位素质量不同，但其种类和比例是恒定的。1961年，把碳在自然界含量最丰富的一种同位素，碳12的一个原子的质C量定为12个质量单位，把它作为"基准"，某种元素的所有同位素按丰度的平均值与基准之比，就是这种无素的原子量，即元素周期表列出的原子量。

The constituent ratio, prevalence and average ectoparasite abundance were used to reflect the prevalence and density of ectoparasites. Non-parametric Mann-Whitney U-tests were used to test differences in the abundance and richness of ectoparasites between female and male hosts. Spearman correlation analysis was used to analyze the relationship between ectoparasites and the body parameters of hosts.

用染虫率和虫指数反映体表寄生虫的流行和密度状况，用统计分析中的非参数检验（Non-parametric Mann-Whitney U）分析雌雄小兽宿主间寄生虫数量差异，用Spearman相关分析分析体表寄生虫数量与宿主身体参数的关系。

Based on GC and GC-MS analyses, the geochemical characteristics of these typical deep viscous oils are listed as follows:(1) strong preference of even n-alkanes over odd n-alkanes;(2) strong preference of phytane over pristane, i. e. Pr/Ph ratio＜＜1;(3) high abundance of gammacerane relative to C〓hopanes;(4) much more amounts of C〓 pentakishomohopanes than C〓 tetrakishomohopanes and even C〓 trishomohopanes.

罗家—垦西地区稠油饱和烃色谱、色谱-质谱分析结果展示：(1)正构烷烃具有明显的偶奇优势；(2)类异戊二烯烷烃具有较强的植烷优势，姥姣烷/植烷比值远小于1；(3)伽玛蜡烷相对含量(相对于C30藿烷)普遍很高；(4)C35升藿烷明显高于C34、甚至C33升藿烷；表现出膏盐湖相生物标志物的组成特征。

Brey's (1990) empirical formula was used to calculate the secondary production and P/B ratio of macrobenthos according to macrobenthos biomass and abundance obtained in Shenhu Bay. The results showed that the mean annual secondary production and P/B ratio were 0.599g/(m^2a) and 1.561 respectively.

根据各个季节获得的大型底栖动物栖息丰度和生物量，采用Brey (1990)的经验公式进行了大型底栖动物次级生产力和P/B值的计算，得出深沪湾潮下带大型底栖动物年平均次级生产力和P/B值分别为0.599g/和1.561。

As far as the abundance ratios with respect to Fe are concerned, we suggest that:(1) The continuous decrease of with metallicity even for ＞-0.3 argues for an increasing ratio of SNe Ia to SNe Ⅱ also at the later stages of the disk evolution.

从元素丰度比率随的变化关系中，我们可以得到以下几个推论。(1)随着的增加持续下降，说明即使在银盘演化的晚期阶段，Ia与Ⅱ型超新星的比率仍然在上升。

Therefore,when the geology risk assessment is done,the geology risk index as effective thickness,porosity,permeability,abundance,exploration maturity,heterogeneity,exploration success ratio and gas combination are selected.Using the gray cluster method,this paper conducts the synthetic evaluation and research on geological risk taking 7 well blocks in a certain region as an example and according to geology risk assessment characteristics,which can quantize and display the quality of nonproducing reserves in each area.

为此，在对地质风险评价时，选取了有效厚度、孔隙度、渗透率、丰度、勘探成熟度、非均值性、勘探成功率、含气组合等8个地质风险指标，以某油田某地区的7个井区为例，结合地质风险评价的特点，运用灰色聚类法对其进行地质风险综合评价研究，使以各个区块为单元的未动用储量的优劣得以量化表现。

The absorption spectrum center wavelength of dolomite is near 232 μm is shorter than 235 μm of limestone,and thus RBD7 and RBD8 can be employed effectively to identify dolomite and limestone,respectively. Felsic rocks show AlOH and Fe3+ absorption characteristics in the VNIRSWIR region,while the maficultramafic rocks show Fe2+ and Fe,MgOH absorption features,hence the use of different valence state of iron and secondary minerals can distinguish them:ASTER band2/band1 represent Fe3+ distribution,ASTER band2/band1 represent the Fe2+ distribution,RBD6 can estimate the AlOH mineral abundance. Psammitic/pelitic schist containing phengite,chlorite,stilpnomelane,as well as the weathered surface covered by clay minerals,exist characteristic absorption spectrum in the 221 μm(band 6),and has a high reflectance in 165 μm(band 4),while the blueschist/greenschist show high reflectance in the 221 μm(band 6),and it exit low reflectance in 165 μm(band 4),and blueschist/greenschist appear low ASTER band4/band6 ratio.

白云岩的CO2-3吸收谱带中心波长位于232〖KG*3〗μm，与灰岩的CO2-3 吸收谱带中心波长位置235 μm相比，具有向短波长方向移动的特点，据此可以利用RBD7、RBD8分别有效的识别白云岩和灰岩；长英质岩石显示AlOH和Fe3+ VNIRSWIR吸收特征，而基性超基性岩石显示Fe2+和Fe、MgOH特征，利用不同的铁价态和次要矿物可以区分它们：ASTER band2/band1代表了含Fe3+矿物分布信息、ASTER band5/band4代表了含Fe2+矿物分布信息、RBD6可以估计AlOH矿物的丰度；砂质/泥质片岩含较多的多硅白云母、绿泥石、黑硬绿泥石以及风化后表面覆盖的其它粘土矿物，在221 μm（band 6）存在有特征的吸收谱带，并且在165 μm（band 4）具有较高的反射率，而蓝片/绿片岩在221 μm（band 6）反射率较高，不具有明显特征吸收谱带，同时其在165 μm（band 4）反射率较低，因此蓝片/绿片岩ASTER band4/band6 比值低。

Nematode density, generic richness, diversity, and relative abundance of bacterivores and fungivores were higher at each stage of GT transect (from grassland to tea plantation) than at the equivalent stage of ST transect (from shrubland to tea plantation), whereas lower values of Maturity index and Nematode Channel Ratio occurred at each stage of GT transect relative to ST transect.

研究发现，GT系列各植物群落类型中的土壤线虫密度、属数、多样性、食细菌和食真菌线虫相对多度都高于ST系列中的相应植物群落类型，而土壤线虫总成熟指数和线虫通路比值均低于ST系列中的相应植物群落类型。

From 6860 to 3170 cal.yr BP,semi-desert steppeexpanded,regional montane forest steppe retreated,suggesting a prolonged warm and dryclimate.Between 3170 and 2340 cal.yr BP,regional forest steppe expanded whereassemi-desert steppe retreated,indicating the climate became cool and wet gradually and thehumidity reached the maximum at the end of this stage.During 2340～1600 cal.yr BP,Poaceae steppe dominated whereas wetland meadow expanded and the montane forest stepperetreated,suggesting a cool and wet climate prevailed,wormwood grass steppe prevailed andthe climatic instability increased after 1600 cal.a BEThe climate and environmental reconstructions by pollen were supported by the diatomrecords.A relative high lake level and moister climate prevailed between 8660 and 7230 cal.yr BP as inferred by the dominance of planktonic diatom genera and high planktonic/benthicratio (〉40).low lake level and dry climate sustained during 7230～2330 cal.yr BP assuggested by the low abundance of planktonic diatom and low planktonic/benthic ratio ～20and the lake returned to high level during 2330～930 cal.yr BP as inferred by there-dominance of the planktonic diatom and the high value of palnktonic/benthic ratio.The pollen-based climate reconstruction was also consolidated by the grain size andPediastrum concentration records.

Ugii Nuur湖周围现代孢粉研究表明：松属为空气传播的外来花粉，其含量变化可能指示了远山森林草原发育状况；禾本科具显著低代表性，母体植物建群时含量通常在10％以下：藜科花粉含量可以指示区域气候干旱程度。2、以现代孢粉研究为基础、可靠AMS~(14)C年代为框架，Ugii Nuur孢粉记录高分辨率地重建了蒙古国中部地区过去8660 cal.yr BP以来的植被和气候变化。8660～7800 cal.yr BP研究区植被为禾草草原，湖畔及河谷低地发育苔草草甸，远山发育松属针叶林和森林草原，气候温和略湿润；其中8350～8250 cal.yr BP湿生草甸扩张，旱生植物成分减少，气候凉湿。7800～6860 cal.yr BP旱生成分增加，气候转向暖干。6860～3170 cal.yrBP半荒漠草原扩张，远山森林草原退缩，山地草原和河谷及湖畔湿生草甸退缩，气候持续暖干。3170～2340 cal.yr BP半荒漠草原退缩，远山森林草原扩张，气候转凉变湿，末期湿度条件达最佳。2340～1600 cal.yr BP禾草草原发育，湖畔及河谷低地湿生草甸扩张，远山森林草原略有退缩，气候总体较凉湿。1600 cal.yr BP以来研究区发育禾草-冷蒿草原，气候波动较大。

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