系出
- 与 系出 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In a conclusion, there were a considerable proportion of relict and remnant elements which can be traced back to Mesozoic, and even Paleozoic, as well as typical ancient endemism. All of these fully showed evolutionary conservatism and phylogenetic antiquity of the Alsophila spinulosa community during the process of vegetation evolution.
由此可见,桫椤群落区系组成与起源年代都十分古老;与桫椤伴生的成分中存在较大比例的中生代甚至古生代的古老遗存物种,也明显表现出其在植被进化中的保守性和种系发生的古老性。
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Nine super sweet corn inbred lines with abroad germplasm T1, T2, T3, M1, M2, M3, R1, R2, R3 were selected as tested lines, and original inbred lines B, C, D, 6, D2 as testing ones in this examination. 45 crosses were made by means of incomplete diallel method, and the genetic parameters of the groups and the combing ability of 10 traits, growth period, plant height, ear height, ear length, ear diameter, core diameter, baldhead length, rows per ear, kernels per row, single ear weight were tested and analyzed by means of NCⅡ design.
选用具有国外血缘的T1、T2、T3、M1、M2、M3、R1、R2和R3共9个超甜玉米自交系做被测系,以原有5个自交系B、C、D、6和D2做测验系,采用不完全双列杂交法组配出F1杂交组合45个,对生育期、株高、穗位高、穗长、穗粗、芯粗、秃尖长、穗行数、行粒数、单穗重10个性状按NCⅡ设计的原理和方法进行配合力测定与分析,并估算群体遗传参数。
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The results were used to estimate the elastic modulus of the SMA by the cantilever beam deflection formula.
如此藉由一系的实验资及分析结果,回归分析出弹性系随温而变化的函关系。
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The necessary and sufficient condition, which fundamental and total biorthogonal system in Banach spaces is Cesaro basis, is given.
利用BK空间的理论讨论了具有给定的完全双正交系的Banach空间X的乘子空间M的性质,给出了Banach空间X上基本完全的双正交系成为Cesaro基的充要条件。
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Utilizing the theories of BK spaces and multiplier spaces, this paper discuss the necessary and sufficient condition which fundamental and total biorthogonal system in Banach spaces which don t contain copy of is unconditional basis.
利用BK空间的理论讨论了具有给定的完全双正交系的Banach空间X的乘子空间M的性质,给出了Banach空间X上基本完全的双正交系成为Cesaro基的充要条件。
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The floristic components have character as following: geographic -al elements of species is relatively simple;there are more species of world distributi -on and tropical genera,and there have world blazon predestined relationship and tropical predestined relationship.Composite,standing grain,legumina have absolutely predominance make of the backbone of floristic.Seed plants are mainly made up of herbage plants.
种子植物区系成分具有以下特点:种的地理成分相对简单;表现出明显的亚热带特征,并具有热带向温带过渡的特点;菊科、禾本科、豆科占有绝对优势,构成植物区系的骨干;种子植物主要由草本植物组成,草本植物占绝对优势。
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The causes of shield tunnel defections could be divided into six branches: the segment dislocations, lining material deterioration and seepage. etc. Fault trees are also founded to illustrate each branch. 23 quantitative elements from the fault trees are selected to serve as the diagnosis indexes, all of which could be applied in engineering practice. By using the AHP method, a 3-level diagnosis index system is established. Afterwards, the procedure of setting up the quantitative judging criteria is given, as well as the relative index weight of index layer, by using the improved Analytic Hierarchy Process-multiplication scale method. At last, the values of corresponding parameters of membership functions are set, with the Cauchy distribution model.
将盾构隧道常见病害成因分为管片错位、衬砌材质劣化以及渗漏水等6个子系,对每个子系构建了病害故障树;从工程应用角度出发,从故障树中选取了23个可定量化因素作为评价指标,通过层次分析法建立了三层病害评价指标体系;对体系中单一评价指标的定量化分级方法进行简述,并给出所有指标的建议分级标准,采用改进的层次分析法-乘积标度法确定了各评判指标之间的相对权重;确定了基于Cauchy分布模型的隶属函数的关键参数。
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The World of Warcraft Mage has a line of spells to manipulate Frost and Flame, as well as the added ability and utility of conjuration.
WoW中的法师掌有一系列冰系和火系的法术,以及附加的能力和咒语的效用(译者补充:比如在战斗中召唤一个水元素来抵挡攻击,或是变出食物和一些其他咒语)。
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Aiming at the mathematic model of shafting crankle coupling vibration based on the subsection continuous mass model,the multidimensional frequeney analysis method is put forward and developed.Combining frequency change with shafting configuration parameter,it's more favorable to have direct analysis.The method...
针对基于分段连续质量模型的轴系弯扭耦合振动数学模型,进一步简化并提出多维频率分析方法,将频率变化与轴系的结构参数联系起来,有利于直观分析,同时给出分析振型、共振频率及共振模态等的方法
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In order to screen out fine pastures adapted to the east seashores of China,Spartina patens mutant lines induced by low energy heavy ion were grown in a simulating the seashore condition outdoors.A comparison of biomass and photosynthetic ability among 10 mutant lines had been carried out,contents of main organic and inorganic nutritients and main heavy metals in above-ground parts of each line were assayed.
为从经低能重离子诱变的狐米草突变系中筛选出适合在滩涂生长、营养丰富的牧草株系,在前文比较了模拟滩涂环境种植的各突变系生物量和光合能力的基础上,本文进一步检测了几种主要有机和无机营养成分含量以及几种主要重金属污染元素在各突变系地上部分的积累量。
- 推荐网络例句
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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.
。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。
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Go down on one's knees;kneel down
屈膝跪下。。。下跪祈祷
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Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.
Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。