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  dwarf
     Transgenic Wheat Resistant to Barley Yellow Dwarf Virus GPV Using Replicase Gene
     大麦黄病毒GPV株系复制酶基因介导的抗病毒转基因小麦的研究
短句来源
     MOLECULAR BIOLOGY OF RICE BLACK STREAKED DWARF FIJIVIRUS
     水稻黑条缩病毒分子生物学
短句来源
     Cloning, Expression and Transformation of Barley Yellow Dwarf Virus GPV ORF5 Gene
     大麦黄病毒GPV株系ORF5基因的克隆、表达载体构建及转基因研究
短句来源
     Identification, Detection and Molecular Variability of Coat Protein Gene of the Pathogen of Maize Dwarf Mosaic Disease
     玉米花叶病病原鉴定、检测及外壳蛋白基因变异研究
短句来源
     Isolation of Homologous Sequences of Dwarf Gene and Construction of BAC Pools in Wheat
     小麦秆基因同源序列的克隆与BAC源合池的构建
短句来源
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  stunt
     Cloning, Sequence Analysis and Prokaryotic Expression of the vRNA3 NS3 Gene in Rice Grassy Stunt Virus Shaxian Isolate
     水稻草病毒基因组vRNA3 NS3基因的克隆、序列分析及原核表达
短句来源
     The nucleotide sequence of the gene adjacent to the nucleocapsid protein gene on the rice yellow stunt virus (RYSV) genome,tentatively named gene 2,has been determined from cDNA clones isolated from a RYSV genomic cDNA library.
     从水稻黄病毒(RYSV)基因组的cDNA文库中,获得了包含邻接核衣壳蛋白基因的基因2的克隆,并测定了其核苷酸序列。
短句来源
     1. The first part of present study was focused on the functions of structural protein P9and nonstructural proteins Pns6 and Pns10 of rice ragged stunt virus (RRSV).
     本论文第一部分主要对水稻齿叶缩病毒(Rice ragged stunt virus,RRsv)的结构蛋白(Pg)和非结构蛋白(Pns6,Pnslo)的功能进行了研究。
短句来源
     Transformation of SP Gene of Rice Grassy Stunt Virus and Disease Resistance Analysis
     水稻草病毒SP基因转化水稻及其抗性分析
短句来源
     The Phosphorylation of NS Protein of Wheat Rosette Stunt Virus
     小麦丛病毒NS蛋白的磷酸化(英文)
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  dwarfing
     A Study on Dwarfing Physiological Characteristics of Zhaai 76[Malus baccata (L.) Borkh]
     扎76(Malus baccata (L.) Borkh)的化生理机制研究
     While the length of the interstocks of PDR_ 54, S_5 and S_2 increased to 20cm, they exhibited dwarfing potentials of 44. 1%,41.5% and 75.2% respectively, which were significantly different from that of CK.
     但当中间砧砧段长增至20cm时,PDR54、S5和S2表现了良好的化效应,其致程度分别为44.4%,41.5%和75.2%,属于化和半化砧木.
短句来源
     Distribution of Dwarfing Genes Rht-B1b and Rht-D1b in Chinese Bread Wheats Detected by STS Marker
     用STS标记检测秆基因Rht-B1b和Rht-D1b在中国小麦中的分布
短句来源
     Effects on Agronomic Characteristics of Rht-B1b,Rht-D1b,Rht-B1c Wheat Dwarfing Genes and theirs Combinations in Artificial Climate Chamber
     Rht-B1b,Rht-D1b,Rht-B1c小麦秆基因及其互作对小麦农艺性状的影响
短句来源
     【Method】A total of 239 Chinese wheat cultivars and advanced lines from major wheat regions were detected by STS markers to understand the distribution of the dwarfing genes Rht-B1b(Rht1) and Rht-D1b(Rht2).
     方法选用中国主要麦区品种(系)239份,用STS标记检测秆基因Rht-B1b(Rht1)和Rht-D1b(Rht2)的分布规律,验证其PCR标记在分子标记辅助育种中的可用性。
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  “矮”译为未确定词的双语例句
     Molecular Cytogenetic analysis of Chinese winter wheat germplasm Aimengniu
     冬小麦种质“孟牛”的分子细胞遗传学研究
短句来源
     Identifying on Photo-thermo Sensitive Genic Male Sterile Lines in Rice and Study on Xa21 Transgenic Progeny of Peiai64S
     水稻光温敏核不育系鉴定及培64S转Xa21基因后代分析
短句来源
     Fertility Expression and Stability of the Photo- and Thermo-sensitive Genic Male Sterile Rice Pei'ai 64S under Controlled Low Temperature Conditions
     光温敏核不育水稻培64S低温下育性表达及其稳定性研究
短句来源
     Identification, Fine Mapping and Candidate-gene Screening of a New Semi-dwarf Gene sdt2 in Rice (Oryza Sativa L.)
     水稻半秆基因sdt2的鉴定、精细定位与候选基因筛选
短句来源
     Fine Mapping of One Semidwarf Gene sdt3 and Candidate-gene Screening and Functional Analysis of the Other Semidwarf Gene sdg in Rice (Oryza Sativa L.)
     水稻半秆基因sdt3的精细定位和sdg的克隆与功能分析
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  dwarf
Nonrepresentative montane mossy dwarf forests (above 2,100 m) in the area are distributed in windward sides and in barren land on the mountain slopes.
      
Genetic analysis established that Aitaiyin3, a dwarf rice variety derived from a semidwarf cultivar Taiyin1, carries two recessive semidwarf genes.
      
Dwarf and necrotic forms predominated among the NF-tolerant mutants, while pigment mutants and those with changed root morphology prevailed among the AF-tolerant and PB-sensitive mutants, respectively.
      
The diameter of dwarf birch pollen was determined in different tundra subzones of Western Siberia.
      
Effect of Individual Heterzygosity on Fruiting in Dwarf Siberian Pine (Pinus pumila (Pall) Regel)
      
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  stunt
Sequence analysis of leader and trailer regions of rice yellow stunt rhabdovirus and characterization of theirin vivo transcript
      
The 3' leader and the 5' trailer of the rice yellow stunt rhabdovirus (RYSV) genomic RNA have been cloned and sequenced.
      
P19 of tomato bushy stunt virus suppresses RNA silencing induced by short hairpin RNA in mammal cells
      
The function of the P19 of tomato bushy stunt virus, which suppresses RNAi in mammal cells, was then studied using these two systems.
      
The RNAi systems of GFP and luciferase were constructed successfully, demonstrating that P19 of tomato bushy stunt virus has the ability to counteract the RNAi effect induced by shRNA in mammal cells.
      
更多          
  dwarfing
Allele Distribution at Locus WMS261Marking the Dwarfing Gene Rht8in Common Wheat Cultivars of Southern Ukraine
      
A microsatellite locus WMS261tightly linked to a dwarfing geneRht8was analyzed in wheat cultivars and selection material of the Institute of Plant Breeding and Genetics.
      
The used genetic model comprised a series of almost isogenic lines of wheat alternative by the alleles of dwarfing genes (RhtB1c, RhtB1b, and Rht14) and the original cv.
      
Sexual size dimorphism in the Chondracanthidae is very marked: we investigate whether it is a consequence of dwarfing of males or females becoming giants.
      
The severe, dwarfing strain is transmitted to maize plants only by Laodelphax striatellus and Javesella pellucida.
      
更多          


The effect of pressure on photographic sensitivity is discussed on the experimental basis that the quantity E/EC, where E is the illumination actually used when the photographic emulsion is under pressure, and Ee the illumination which would be required to produce the same optical density when the emulsion is under no pressure, is a function of pressure only and that for pressures greater than a certain value, E/Ee becomes a linear function of the pressure.

当照相时,照相片子——映像纸,软片,或玻璃板——被压,则其感光性减弱,是为照相的压力效应。设E为照相片子在压力P下得光密度d所需之光照度,若片子不受压力则用光照度E_e即可得此同一之光密度d,故E_e可称在压力P下E之有效照度。吾人实验证明E/E_e为压力P之函数,当p>200kg/cm~2时,E/E_e与P成正比例。 此照相的压力效应,与照相时所用光之颜色,极有关系。黄色光较绿色光为显,绿色光较蓝色光紫色光为显至紫外光则几无此效应。 又此效应之大小,随各种照相片子而不同。就我们所研究的蔡爱斯伊康正色软片,伊司门人像软片,和克发等色软片而论,以第一种为最大第二种次之第三种为最小。 这个效应,在实际上,或可有些应用。

The headblight or scab of wheat caused by Gibberella zeae (Schw.) Petch.has in recent years become more prevalent in the rice-wheat growing area ofEastern China with two heavy epidemics in 1952 and in 1954.It was reportedfrom this area that wheat varieties showed marked differences in their susceptibilityto headblight and that native varieties in general were less susceptible than theimproved ones.It was also reported that the degree of susceptibility appeared tobe related to the stage of host development.In...

The headblight or scab of wheat caused by Gibberella zeae (Schw.) Petch.has in recent years become more prevalent in the rice-wheat growing area ofEastern China with two heavy epidemics in 1952 and in 1954.It was reportedfrom this area that wheat varieties showed marked differences in their susceptibilityto headblight and that native varieties in general were less susceptible than theimproved ones.It was also reported that the degree of susceptibility appeared tobe related to the stage of host development.In 1952,varieties with earlier date ofheading were generally less susceptible than those which headed late. Varietal tests for the headblight resistance were made in Nanking in 1952and 1954.In 1952,235 varieties and hybrids were studied for their resistance toscab under natural conditions in the field.Great differences were found in theirdegree of infection,although none of them was immune.The percentages of in-fected heads ranged from 0.9 to 89.1 with most of them having 10 to 40% infec-tion.No definite correlation was seen between the percentage of infection andthe date of heading or of maturing.In 1954,tests on varietal resistance to scabwere again made with 40 varieties and hybrids including those being relatively lesssusceptible in the previous test.Attempts were made to induce epidemics in thefield by means of artificial inoculation.Results indicated that both mycelial andconidial suspensions were similarly effective for artificial inoculation.The averagepercentages of infected heads in the inoculated plots ranged from 4.2 to 77.7 incontrast to the uninoculated plots where the average percentages of infected headsbeing only trace to 7.1 with one variety not infected. From the experimental results obtained in 1952 and 1954,it was found thatrelative stability in resistance to headblight existed among different wheat varie-ties,although there was great variation in varietal resistance due to the effect ofenvironmental factors.Two hybrids,"5201" and "5204",were found to be muchmore resistant than all other varieties tested in both years.Hybrid "5204" gave ??0.9% of infected heads in 1952 and 3.4% in 1954,and hybrid "5201" gave5.5 and 9.0% of infected heads in the respective years.Both hybrids also possessother desirable characteristics such as early maturity,relative high yield,stiffystems,and high resistance to the stripe rust. Greenhouse studies were made in 1954 with two susceptible varieties ofwheat for testing their susceptibility to headblight at six different stages of deve-lopment from shooting to hard dough.Results indicated that the plant was sus-ceptible at all these stages of development with a tendency of being more heavilyinfected toward maturity.It was also observed that temperature had obvious effecton the degree of infection.Plants inoculated at flowering stage were more heavilyinfected when kept at 25℃ after inoculation than when kept at 15℃.However,the inoculated plants kept at 25℃ during the day and at 15℃ at night resultedin a degree of infection similar to those kept at 25℃ all the time.

(一)小麦赤微病在苏、浙、皖的稻麦两熟地区经常严重发生,1952及1954年两度猖獗流行,造成苏南及浙江地区小麦生产上的严重损失。通过调查,发现各地小麦品种对病害的反应确有显著差异。地方品种,一般发病较轻,而改良品种如“2905”、“2419”、“玉皮”、“立多”等,常常严重地感染病害。(二)1952年在自然情况下,观察此较235个小麦品种结果,虽没有一个品种不发病,但品种间的发病率相差极大,自0.9%至89.1%,而不同品种感染程度的轻重与抽穗期及成熟期的早迟关系不大。(三)1954年大田人工接种结果,效果显著,供试40个品种接种区的最高发病率达77.7%,而自然感染区的最高发病率只有7.1%。在接种试验中,初步证明:(1)大量有效的病原体与适合病害发生的气候因子同是病害流行的主要条件;(2)接种方法,用菌丝体接种与用分生孢子接种的效果,并无多大差别;(3)品种的抽穗先后,与发病轻重无一定关系。(四)温室试验指出,小麦自抽穗至糊熟各期麦穗被害率相似,但小穗的被害率在抽穗期最低,开花以后,有愈近成熟感染程度愈重的趋势。(五)开花期接种后的小麦,置於25℃的麦穗被害率和置於15℃的相似,但前者的小...

(一)小麦赤微病在苏、浙、皖的稻麦两熟地区经常严重发生,1952及1954年两度猖獗流行,造成苏南及浙江地区小麦生产上的严重损失。通过调查,发现各地小麦品种对病害的反应确有显著差异。地方品种,一般发病较轻,而改良品种如“2905”、“2419”、“玉皮”、“立多”等,常常严重地感染病害。(二)1952年在自然情况下,观察此较235个小麦品种结果,虽没有一个品种不发病,但品种间的发病率相差极大,自0.9%至89.1%,而不同品种感染程度的轻重与抽穗期及成熟期的早迟关系不大。(三)1954年大田人工接种结果,效果显著,供试40个品种接种区的最高发病率达77.7%,而自然感染区的最高发病率只有7.1%。在接种试验中,初步证明:(1)大量有效的病原体与适合病害发生的气候因子同是病害流行的主要条件;(2)接种方法,用菌丝体接种与用分生孢子接种的效果,并无多大差别;(3)品种的抽穗先后,与发病轻重无一定关系。(四)温室试验指出,小麦自抽穗至糊熟各期麦穗被害率相似,但小穗的被害率在抽穗期最低,开花以后,有愈近成熟感染程度愈重的趋势。(五)开花期接种后的小麦,置於25℃的麦穗被害率和置於15℃的相似,但前者的小穗被害率此后者高。日间25℃和夜间15℃交替的变温处理,发病情形与始终置於25℃的相近。(六)不同小麦品种对于赤微病具有相对稳定的抵抗性或感染性。“5201”及“5204”等杂交系,在自然感染和人工接种情形下,发病都很轻微,并且具有早熟、丰产、秆硬和高度抵抗条锈等优良特性。

The problem of investigating the vibration properties of continuous girders on elastic piers frequently occurs in practical design work. An approximate method of attack is to replace the elastic pier by a spring support. This method simplifies greatly the analysis and is generally adopted in practice. In the first part of this paper, this approximate method is investigated in detail and complete solutions including the effect of initial conditions are given. The computations are made more systematic and simple...

The problem of investigating the vibration properties of continuous girders on elastic piers frequently occurs in practical design work. An approximate method of attack is to replace the elastic pier by a spring support. This method simplifies greatly the analysis and is generally adopted in practice. In the first part of this paper, this approximate method is investigated in detail and complete solutions including the effect of initial conditions are given. The computations are made more systematic and simple by the adoption of a system of constants defined as the dynamic shape constants and load constants of the structure. In the second part of this paper, the more accurate method of analysis is investigated. The exact frequency equations of the system are obtained by writing down the dynamic equations of the girders and the piers simultaneously and the boundary conditions are taken into consideration. It is shown that by taking only the fist one or two terms of the series expansions, the exact frequency equation reduces to the approximate one. It is concluded that the approximate method will give adequate solutions in the case when the piers are rigid and when only the lower frequencies of the natural mode need be considered. Particular solutions of structures under transverse vibrations are worked out and is found more involved than that given by the approximate method.

本文所謂架空結構是指搁置在較高的支墩上的連續梁結構,例如高架橋梁或水電站的架空輸水管道等。這類結構在承受震動荷載(例如地震)時,常會引起較大的變形和应力。如支墩較粗,則在計算較低的頻率時,其作用可近似的以一彈簧支座代替之,而忽略支墩本身的結構震動影響。這是一個常用的假定,可以使計算工作充分簡化。本文首先對這一情况作了詳盡討論,給出较完整的解答,包括起始條件影響在内,並提出用“載常數”及“形常數”的觀念來進行計算。然后本文給出考虑支墩的震動影響時的精確解答,分別就縱横方向的震動進行討論,並指出近似計算公式和精確公式间的關係,近似公式只能在支墩較剛固和計算较低階的頻率時才適用。文中列出了結構作横向諧和震動時的特別解答,可見其計算工作量將比近似法增加不少。

 
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