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In better management lawn community Geranium sibiricum, Potentilla anserine and Leymus secalinus are the dominant weeds all the time and Geranium sibiricum is the most dominant weed.The regular pattern of Shannon-Weinor index of turf weeds in three different management lawn communities is that in worse community maximum Shannon-Weinor index appears in spring and fall but in better community is in late-summer and primary-fall.

三种管理水平不同的草坪群落中杂草的多样性指数变化规律是,管理水平较差和一般的草坪群落中,杂草的香农-威纳指数的最大值出现在春季和秋末;管理水平较好的草坪群落中,杂草的香农-威纳指数的最大值出现在夏末秋初。

In near-neutral pH solution, the cracking mode is transgranular with the feature of quasicleavage.The function of SCC factors are as follows:(1)The additional potential takes an important role in the SCC behavior of X70 pipeline steel: the susceptibility to SCC increased with decreasing cathodal potential,HIC is the dominant reason,the crackles on the surface are almost vertical to stress;On the country, at anodic potential,there is a critical potential,below which the dominant reason is anode-dissolving supported by hydrogen,and the crackles on the surface are not vertical to stress.

电位因素和环境因素的影响作用为:(1)在阴极极化电位区,SCC敏感性随电位的负移而增加,氢致开裂作用占主导,表面裂纹多与拉应力垂直;在阳极极化区间,存在阈值电位,低于阈值电位时,SCC为氢促进阳极溶解所致,表面裂纹多与主应力方向成一定角度。

The Eco-physiological Characteristics of Dominant SpeciesArtemisia halodendron, Artemisia scoparia and Cenchrus calyculatus were the dominant species in three types of vegetation.

优势植物种生理生态特性三种植被类型的优势种分别为差不嘎蒿、黄蒿和光梗蒺藜草。

The dominant species of them were Artemisia halodendron Setaria viridis respectively; The reconverted grazing land and the natural reconverted farmland consisted of herb layer and microbiotic crust layer, but itsmain layer was herb layer. The dominant species of them were Cenchrus calyculatus Artemisia scoparia respectively.

草本片层的现阶段优势种为狗尾草;放牧自然恢复地和退耕自然恢复地均由草本片层和生物结皮片层构成,但其主要片层均为草本片层,该层现阶段优势种分别为黄蒿和光梗蒺藜草。

A total of 19 algal genera were indentified, including 2 genera of Cyanophyceae、6 genera of Chlorophyceae, 9 genera of Bacillariophyceae、2 genera of Euglenophyceae. In Apirl, the dominant algal genus of the east-southern water gate and the southern new Plant 7 were Oscillatoria. In the other two months, the dominant algal genera of the three sample sites were diatoms.

在四月份东南水门与南7新厂主要优势藻属是颤藻属,其他月份与地点皆以矽藻为主,所以结果显示麦寮大排以矽藻为主要优势族群,以七月份含量最高时可占七月份总藻类数的91.6%左右。

The dominant phytoplankton species outside and inside the bay were Cylindrotheca closterium and Skeletonema costatum, while the samples in the harbor had Skeletonema costatum, Eucampia zodiacus, and Chaetoceros curvisetus as the dominant species.

湾外和湾内站位的浮游植物组成相似,优势种为新月柱鞘藻和中肋骨条藻,港口浮游植物优势种类为中肋骨条藻、浮动湾角藻和旋链角毛藻。

In March, May and July, Cyanophyta was the dominant one, with high proportions of 45.6%, 55.9% and 87.7%, respectively, whereas the proportions for Bacillariophyta decreased to 30.1%, 25.9%, and 1.1%, respectively. In November, proportions for Bacillariophyta and Chlorophyta were equivalent, 40% each, and the Cyanophyta composed below 20%. In December, Bacillariophyta made up 25.6% and Cyanophyta 38.2%. In March, May and July, dominant species of Cyanophyta were Microcystis aeruginosa, Pseudoanabaena, and Gloeothece linearis. In dry January, November and December, species of Bacillariophyta were dominated by A chnanthes sp., Melosira ambigua, Melosira granulata and Cyclotella meneghiniana.

全年中,蓝藻与硅藻比例变化较大,二者呈相反的变化趋势。1月份硅藻占较高比例(63.1%),蓝藻较低(〈20%);3、5、7月份蓝藻比例较高(分别为45.6%、55.9%、87.7%),而硅藻较低(30.1%、25.9%、1.1%);11月份硅藻与绿藻比例相当(各占40%),蓝藻低于20%;12月份硅藻与蓝藻比例分别为25.6%与38.2%。3月份和丰水期浮游植物优势种主要为铜绿微囊藻、假鱼腥藻和线形粘杆藻等蓝藻种类,枯水期的1月、11月和12月主要以曲壳藻类、模糊直链藻、颗粒直链藻和梅尼小环藻等硅藻种类为优势种。

The total seed storage in topsoil (0-10 cm) was 83499-109141 indm^(-2) for natural wetlands and 9140-47452 indm^(-2) for reclaimed paddy fields. In natural wetlands, the seeds were of 16-30 grass plant species, being dominant with Polygonaceae and Cyperaceae or Cyperaceae and Gramineae; while in reclaimed paddy fields, the seeds were of 7-16 grass plant species, with the dominant of Gramineae. The seed storage and species numbers were greater in Shengjin Lake than in Shibasuo Lake. Higher seed bank storage and more species were observed in the paddy fields from Shibasuo wetland with 30 years of cultivation than from the Shengjin Lake wetland with over 50 years of cultivation.

结果表明:天然湿地种子库密度为83499~109141粒m^(-2),而开垦为稻田30~50年后种子库密度为9140~47452粒m^(-2);天然湿地的土壤种子库物种数为16~30种,以蓼科-莎草科或莎草科-蓼科为优势种,开垦为稻田后物种数下降为7~16种,且趋向于以禾本科为单一优势种;此外,与十八索湿地相比,升金湖湿地有较高的土壤种子库物种数、丰富度和多样性,而开垦年限为30年的十八索稻田土壤种子库物种数和丰富度显著高于开垦年限为50年的升金湖稻田。

The result shows that the Giant Panda habitat in Gansu is an under-plant population of forest communities with Fargesia denudate as the dominant species; that Giant Panda make movements at the altitudes ranging from 1 600 m to 2 000 m in Wenxian County and Diebu County; that the characteristics of bamboo population, geographical environment, along with the integrity of forest communities, are taken as the three dominant factors in influencing the life of Giant Panda;and that the features of the habitat are basically stable but reasonable distribution together with strong artificial disturbance is considered as the potential factor resulting in the habitat unstable.

结果表明:甘肃省大熊猫主要栖息在以缺苞箭竹为优势的下木种群森林群落中,其垂直活动范围主要集中在海拔1 600~2 800 m处,水平分布在文县和迭部一带;竹类种群的特性、地理环境和森林群落的完整性是大熊猫栖息生存的3个主要综合要素;甘肃省大熊猫的生境特征基本稳定,但该区竹类种群的正态性分布和人为干扰强度是构成其生境不稳定的重要潜在因素。

The thesis toke problem of deformation and destroying of the earth mass as it's invention, integrated the earth mass's existing environment, ingredients and macrostructure, discovered mechanism of deforming and destroying, made clear the relationships between those.Through outdoors samples, indoors examination surface wave testing and audio wave testing ,do some research on physical, mechanical, chemical, disintegrative and dynamics property of stuff of earth mass and proposed four kinds of earth mass's stuff formed type;under the guidance of theory of dominant structural surface and adopting precision measurement of structural surface, proposed three dominant kinds of structural surface assembling;based on those , proposed four types of earth mass's deformation and destroying, carried out rationed estimation of stability on four types, then definite the characters of deforming and destroying and controlled relation between environment , stuff, macrostructure and deformation and destroying of mass earth, and breakthrough ordinary principle about soil's deformation and destroying, further proofed the theory of earth mass cybernetics's popularization

本学位论文针对台地危险土体的变形破坏问题,将土体的赋存环境、土体物质组成和土体宏观结构的研究紧密地结合,阐明了土体变形破坏的机制,明晰了土体变形破坏与土体的赋存环境、土体材料组成、土体宏观结构三要素之间的关系,并从土体的物质组成的角度,以野外取样、室内实验、现场面波、声波无损伤测试为手段,研究了土体物质的物理、力学、化学、矿物、崩解性、动力学性质,提出了研究区内土体物质成分的四种组合形式;以优势结构面理论为指导,以结构面的精确测绘为手段,通过统计、归纳与分析,提出三种有利于台地危险土体变形破坏的优势组合形式;据此提出了具有广泛代表意义的台地危险土体变形破坏的四种模式,并对其进行稳定性评价,从而明确了危险土体的宏观结构对变形破坏的控制作用,映证了土体结构控制论。

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相关中文对照歌词
Dominant Species
推荐网络例句

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

The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.

世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。