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in the nature
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  自然界
     From the process of historical development, the evolution and the mutation in the nature are discussed in this paper.
     对自然界演化过程中的进化与演变,从历史发展的过程进行考察,并详细地予以阐述。
短句来源
     To solve this problem, two new routing algorithms were presented for DIN, GD (Gas Diffusion based routing algorithm) which was inspired from the gas diffusion phenomenon in the nature and FOA (Forward-only Agent routing algorithm) which is an intelligent algorithm based on swarm intelligence.
     1.根据自然界中的气体扩散现象,提出了一种新的负载均衡路由算法-GD (Gas diffusion based routing algorithm)。
短句来源
     Pore distribution of soil composed of different sizes of particles is random in the nature.
     自然界中不同粒径土颗粒的随机组合造成土体中孔隙分布的随机性。
短句来源
     galactosidase (α-Gal) belongs to exoglycosidases, which distributed widely in the nature. α-Gal can be classified into two types: α-Gal A and α-Gal B. In vivo, α-Gal A is responsible for the cleavage of terminal α-galactosidic linkages in glycoconjungates;
     α 半乳糖苷酶 (α galactosidase ,α Gal,E .C .3.2 .1.2 2 )是广泛存在于自然界中的一种外切糖苷酶 ,传统上划分为两类异构酶 ,即α 半乳糖苷酶A和α 半乳糖苷酶B。
短句来源
     In this paper, we research the impact of the process of growth plants by some of the environmental factors, but in the nature, as plant organisms, its structural mechanism, the process of growth and interaction with the environment is fairly complex.
     在本文中,虽然研究了部分环境因素对植物的生长形态产生的影响,但自然界中,植物作为一种生物体,其构造机理、生长过程以及与环境的交互作用相当复杂,各种环境因素对植物生长过程中的形态影响也各不相同。
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  在自然界
     It istheory-Laden indeed, but it cannot dispel the objectivity and rationality of scientificfacts , because they reflect the relation existence of R(Oi, Mi, Pi)in the nature , inwhich the identity of the object, that of the medium and that of the subject are alsocritical in sustaining the objectivity and rationality of scientific facts , which wouldnever exist without any of them .
     因为科学事实是嵌在自然界中的三元关系 R(Oi,Mi,Pi)存在的反映,其中的客体的同一性(Oi),传递客体作用的媒介物的同一性(Mi)及主体的同一体(Pi)对科学事实的理性化和客观性同样是决定性的。
短句来源
     However, with the natural science rising in western countries, especially in the 21~(st) century, human faces the crisis such as losing the position in the nature, neglecting the value of life, the going down of the morality and the worsening of the environment.
     但是,随着近代自然科学在西方的兴起,尤其是人类进入二十一世纪以来,人类日益遭受着伴随科技发展而出现的诸如人在自然界地位丧失,忽视对人生价值、人生意义的追求与关切,道德的滑坡以及生态失衡、环境恶化等一系列危机。
短句来源
     The sex of birds is determined by chromosomes ZZ in the male or ZW in the female in the nature, so the sex chromosome of spermatozoa is Z and that of ovum is Z or W.
     在自然界公鸡和母鸡的性别分别由性染色体ZZ和ZW所决定,因此公鸡产生的精子其性染色体均是Z,而母鸡产生的卵子有Z和W两种。
短句来源
     The results do not only emonstrated that avian influenza A (H9N2) viruse could infect men,but also firstly prove that the genetic reassortment could be occurred between different genetic lineages of avian influenza A (H9N2) viruses in the nature.
     进一步证实了禽H9N2毒株能感染人 ,同时首次证实了H9N2不同基因系毒株间 ,在自然界中也能发生基因重配
短句来源
     It is found primarily inthe all-trans configuration in the nature, which has 11 conjugatedcarbon-carbon double bonds.
     在自然界中,它以全反式结构存在,并有 11 个碳碳共轭的双键。
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  “in the nature”译为未确定词的双语例句
     4. The mechanism of oxidative coupling of methane on NiO(001) surface was studied in this paper, the activation energies for the dehydrogenation of methane and the migration of methyl on NiO(001) surface are both obtained, the interaction mechanism between methyl and NiO (001) surface was also interpreted in the nature of orbitals.
     4.对NiO(001)面上的甲烷氧化偶联反应研究,分别得到了甲烷脱氢和甲基迁移的活化能,从轨道本质上揭示了甲基与NiO(001)面的作用机理。
短句来源
     The population density was estimated to be 3.30±0.45(ind./km2)in the nature reserve,then in core area,cushion area and experiment area the densities were signifi-cantly different by one way variance analysis(P<0.01).
     结果表明,区内黑麂平均密度为3.30±0.45只/km2,单因素方差分析表明,核心区、缓冲区、实验区黑麂种群密度存在极显著差异(F2,37=19.31,P<0.01)。
短句来源
     This selected topic is precisely for cuts into the spot according to this, studies the cultural individuality difference reasons of two national sports culture, the law of evolution and development which in the nature, the society and the cultural environment forms, from the angle of the sports study, the geography, the ethnology, in the culture study and comparative science.
     本选题正是依此为切入点,从体育学、地理学、民族学、文化学、比较科学等视角来研究两个民族体育文化在自然、社会与文化环境中所形成的文化个性的差异原因、演进与发展规律,归纳出人类体育发生、演进、发展的普遍性及其特殊性,为探索我国民族传统体育的可持续发展道路做出贡献。 研究表明:
短句来源
     The diagnostic accuracy was 15/18 in pancreatic head carcinoma,8/12 in the body or tail,and 11/17 in the ampulla and papilla,,In the 10 misdiagnosed eases,4 were misjudged in the nature and 4 were mislocated and the rest 2 were misdiagnosed as cholelith.
     超声诊断胰腺癌符合率,胰头癌15/18、胰体(尾)癌8/12、乏特氏壶腹及乳头癌11/17,误诊10例,漏诊3例。 10例误诊中,定性错误及定位错误各4例(各8.5%),误诊为胆管结石2例(4.3%)。
短句来源
     Results:The incidence of the feotus birth defects in the nature population is 1.6%;
     结果:自然人群中胎儿出生缺陷出生前的发生率为1.6%;
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  in the nature
This circumstance is reflected in the nature of the discontinuity, which is analyzed in Section 5.
      
It is shown that the presence of a nonzero peripheral component for the velocity vector of the gas in the shock layer can lead to a qualitative change in the nature of the flow.
      
Depending on the fluid layer thickness, different stages of main flow development may precede the loss of stability; this determines the differences in the mechanisms of loss of stability of the main flow and in the nature of the secondary flows.
      
It was shown that a variation in the nature and concentration of masking ligands cannot cause a change in performance characteristics of the electrode and of the method.
      
In this case, changes in the nature of surfactants and in the conditions of a particular synthesis make it possible to prepare highly dispersed systems with monomesoporous structures.
      
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Chinese rape, varieties of Brassica campestris and B. chinensis and many cruciferous crops including radishes, but except varieties of B. oleracea, are generally affected by a mosaic disease, causing serious losses amounting occasionally to a death rate of over 90%, while an infection rate of over 30% is not uncommon. The symptoms involved were vein-clearing, yellow or green veinbanding, typical mosaic, rugosity of leaf lamina, dwarfing and rosetting. They may appear in different combinations. Flower stalks...

Chinese rape, varieties of Brassica campestris and B. chinensis and many cruciferous crops including radishes, but except varieties of B. oleracea, are generally affected by a mosaic disease, causing serious losses amounting occasionally to a death rate of over 90%, while an infection rate of over 30% is not uncommon. The symptoms involved were vein-clearing, yellow or green veinbanding, typical mosaic, rugosity of leaf lamina, dwarfing and rosetting. They may appear in different combinations. Flower stalks may not come out or are shortened, deformed and twisted. Flowers appeared pale yellow and become abortive, or forming only small and twisted seed pod, which are sometimes spotted with black necrosis, and bearing small and deformed seeds. When the winter temperature is low, diseased plants may succumb first, forming missing hills. Late infections may result only in vein-banding of the upper leaves and partial abortion of the seeds. On several varieties of radish, mostly of the green type, which apparently are more resistant, only fine mottling appears on the leaves while infected. On varieties of B. napella, another oil-bearing group, the symptoms are entirely different (plate 1, fig. 5), appearing as systemic bright yellow spots on the leaves. Necrotic flecking can eventually be found at the center of these spots. Necrotic streaks and spots develop on the flower stalks and seed pods. Dwarfing and distortion occur on leaves, stalks and pods, and death may even be resulted from severe infections. However, this species showed certain degree of resistance to the disease in the form of late infection and the lower incidence of the disease. The viruses from different host plants are cross-inoculable, although some strains do not infect B. napella. None of them can infect the cabbage group by sap inoculation. 3 viruses were identified: differentiated by their physical properties and the host reactions they induced (Tables 1 and 2 for the viruses 1 and 2): 1. Thermal inactivation below 70℃. 2. Producing necrotic local lesions only on N. tabacum var, "Nungling 400" …… virus 1 2. Producing necrotic local lesions and systemic mottling on the same host……virus 2 1. Thermal inactivation above 90℃., necrotic local lesions on N. glutinosa…… virus 3 The first two viruses can be subdivided into 2 strains each by their ability to infect B. napella. Virus 1 is considered to be a strain of Brassica virus 2 or the Turnip mosaic virus; from the type, it differs in not infecting the cabbage group. Virus 2 is identified as a strain of Cucumis virus 1 or the Cucumber mosaic; virus; from the type, it differs in having lower thermal inactivation point (55℃.), lower dilution end point (1: 1,000—3,000); and shorter longevity invitro (2 days), in producing local lesions on tobacco, and in that the typical strain of Cacumis virus 1 gives only a partial protection to this strain on tobacco. The 3rd virus was less studied. It shows affinity to Nicotiana virus 1 or the tobacco mosaic virus. A limited test showed that the first virus was the only virus found present in the field in 1957. An analysis of 17 isolates of virus from the Chinese rape, exhibiting various syndromes of symptoms in the field, gave an Unanimous result in host reactions, indicating that these isolates belong to a single virus. Virus 1 was found to be easily transmitted by sap, by aphids, including peach aphid (Myzus pcrsicae), false cabbage aphid (Rhopalosiphum pseudobrassicae), and cotton aphid (Aphis gossypii). In insect relationship, the virus belongs to the nonpersistent group, a single feeding will enable an active transmission of about 20 minutes. Peach aphid seems to be an effective vector that 2 or more viruliferous aphids per plant are capable of 100% transmission. The virus is not seed-transmitted. Fresh residue of diseased plant in the soil may cause occasional infection of the replanted plants. The virus can infect several cruciferous weeds, but, among them, only Rorippa montana (wall.) Small grows all the year round and possesses a perennial crown. It is also foundto be commonly infected in the nature. Rubbing with infected sap or using aphid as vector, the virus from this weed can easily be transmitted to the Chinese rape, producing the typical mosaic symptoms. This weed, therefore, seems to be capable of beoming a source of inoculum for the primary infection of the Chinese rape.

南京及华东地区的油菜与十字花科蔬菜普遍发生花叶病。病原病毒經抗性(失毒温度、稀释終点、体外保毒期)測定和寄主反应測定,认为可以分作三大类型:分别为芸苔病毒2号,黄瓜病毒1号与烟病毒1号的株系。前两种病毒都能为害油菜、大白菜、白菜、芥菜、蘿卜等,但不为害甘蓝型的蔬菜,并都能引起菠菜和茼蒿的花叶,和在烟上引起局部枯斑。第一型在烟农特400号和心叶烟上不引起花叶,而第二型在烟和心叶烟上都能引起系統性花叶。第一型不为害心叶烟,而第三型可在心叶烟上引起小枯斑。第一型与凌立、楊演的油菜花叶病毒相近似,而和范怀忠、柯冲从十字花科蔬菜中所分离出的分离物1号最为相象。与裘維蕃、王祁楷在白菜上所发現的孤丁病毒的差别,在于不能侵害甘蓝类的蔬菜。第二型病毒与范怀忠、柯冲的分离物3号相近似,但与典型的黃瓜花叶病毒仍具有一定的差异。这些病毒在油菜上所引起的症状却沒有明显的差別。1、2两个类型的病毒都有一部分能为害早生朝鮮型的油菜,引起系統性黄斑及枮斑,病重的也能早期死亡。大田中的油菜病株的病毒,大多属于第一型病毒。病毒主要由桃蚜和蘿卜蚜传染,病毒系非持續性的,蚜虫一次吸毒后,传病期不超过20分钟。两个以上的桃蚜传病率就可达100%。种子...

南京及华东地区的油菜与十字花科蔬菜普遍发生花叶病。病原病毒經抗性(失毒温度、稀释終点、体外保毒期)測定和寄主反应測定,认为可以分作三大类型:分别为芸苔病毒2号,黄瓜病毒1号与烟病毒1号的株系。前两种病毒都能为害油菜、大白菜、白菜、芥菜、蘿卜等,但不为害甘蓝型的蔬菜,并都能引起菠菜和茼蒿的花叶,和在烟上引起局部枯斑。第一型在烟农特400号和心叶烟上不引起花叶,而第二型在烟和心叶烟上都能引起系統性花叶。第一型不为害心叶烟,而第三型可在心叶烟上引起小枯斑。第一型与凌立、楊演的油菜花叶病毒相近似,而和范怀忠、柯冲从十字花科蔬菜中所分离出的分离物1号最为相象。与裘維蕃、王祁楷在白菜上所发現的孤丁病毒的差别,在于不能侵害甘蓝类的蔬菜。第二型病毒与范怀忠、柯冲的分离物3号相近似,但与典型的黃瓜花叶病毒仍具有一定的差异。这些病毒在油菜上所引起的症状却沒有明显的差別。1、2两个类型的病毒都有一部分能为害早生朝鮮型的油菜,引起系統性黄斑及枮斑,病重的也能早期死亡。大田中的油菜病株的病毒,大多属于第一型病毒。病毒主要由桃蚜和蘿卜蚜传染,病毒系非持續性的,蚜虫一次吸毒后,传病期不超过20分钟。两个以上的桃蚜传病率就可达100%。种子不传病。殘留在土壤內的新鮮病根,可以传病。蔊菜在自然情况下可以感染病害。病株上病毒可由蚜虫传至油菜而誘发典型的花叶病,且具有終年生长及終年发病的特性,可能成为初期发病的病毒来源。

The present study is undertaken to compare the physico-chemical properties of foetal AFP and cancerous AFP of the liver purified by immunoadsorbent column with antibody specific to human AFP. For the AFP's from these two sources, it is found that the U. V. absorption maxima occured at 278 nm, their extinction coefficients, E_(1cm)~(1%), were 5.20±0.06 and their molecular weights, 71000. Two AFP fractions are observed in isoelectric focusing with pI's at 4.7 and 5.25±0.05. At 75.5℃ the kinetic constants of thermal...

The present study is undertaken to compare the physico-chemical properties of foetal AFP and cancerous AFP of the liver purified by immunoadsorbent column with antibody specific to human AFP. For the AFP's from these two sources, it is found that the U. V. absorption maxima occured at 278 nm, their extinction coefficients, E_(1cm)~(1%), were 5.20±0.06 and their molecular weights, 71000. Two AFP fractions are observed in isoelectric focusing with pI's at 4.7 and 5.25±0.05. At 75.5℃ the kinetic constants of thermal in activation for immunochemical activity are as follows: the rate constant of inactivation (k) 7.29×10~(-5) sec~(-1), the free energy of activation (E~+) 95.4 KCal·Mole~(-1), the enthalpy of activation (△H~+) 94.7 K Cal·Mole~(-1), and the entropy of activation (△S~≠) 193 Cal·Mole~(-1). Degree~(-1). From evidence furnished by SDS-polyacrylamide electrophoresis it appears most likely that both foetal AFP and cancerous AFP consist of single polypeptide chains. Their amino acid compositions are very much alike and their S-S bonds play a very important role in maintaining the immunochemical activity of AFP. Both GNBr-cleft AFP samples give 7 main peptide-fragments and corresponding peptides have closely similar molecular weights. From the above mentioned results it may be concluded that no differences in the nature of these two AFP's have been observed.

本文比较了胎儿AFP和肝癌AFP的物理化学性质,所测指标未发现本质差异。实验测得紫外吸收峰在278毫微米,消光系数E_(1厘米)~(1%)5.20±0.06。分子量71000左右。等电聚焦观察到AFP至少有两种形式,pI值分别为4.7和5.25±0.05。75.5℃热失活动力学参数:失活速度常数k7.29x10~(-5)秒~(-1),活化能E~≠95.4千卡/克分子,活化热焓ΔH~≠94.7千卡/克分子,活化自由能ΔF~≠27.2千卡/克分子,活化熵ΔS~≠193卡/度·克分子。分子量为71000的AFP分子可能由一条多肽链组成,二硫键对维持其免疫化学活性起重要作用,溴化氰裂解可得到分子量不等的七个多肽片段。

Wind power is a kind of inexhaustible and harmless energy source in the nature. Its application for providing electric power becomes more and more attractive nowadays. However, the wind power is not easy to control, because the change of the wind velocity will change the rotating speed of the wind turbine, Consequently, the output frequency and voltage of the alternator driven by it will also be varied. This is unacceptable either to the consumers or to the parallel operation with an existing power system....

Wind power is a kind of inexhaustible and harmless energy source in the nature. Its application for providing electric power becomes more and more attractive nowadays. However, the wind power is not easy to control, because the change of the wind velocity will change the rotating speed of the wind turbine, Consequently, the output frequency and voltage of the alternator driven by it will also be varied. This is unacceptable either to the consumers or to the parallel operation with an existing power system. For solving this problem, this paper presents a variable speed and constant frequency and magnitude when the wind turbine speed varies within certain limits. This is realized by using an eddy-current coupling between the wind turbine and the alternator and the existing current of the coupling can be automatically regulated by means of electric devices so as to keep the speed of tile alternator practically constant., The features of this system are its compactness, reliability, fine regulation and ease of control. The experimental characteristics will be given and some exploratory viewpoints on the application of this system to wind power generation will be presented.

风能是自然界中取之不尽用之不竭的没有污染的能源,利用风能发电来提供电力,愈来 愈受到人们的重视。但风能比较难于控制,风速的变化会引起风轮机转速的变化,因而由它 所驱动的交流发电机的输出频率与电压也将随之变化,这对用户或与电网并联来说都是不合 适的。为了解决这个问题,本文提出一种变速恒频发电系统,这种系统能保证当风轮机转速 在一定范围内变化时,在交流发电机输出端能获得稳定频率的电压。这种系统是通过将风轮 机与发电机以电磁滑差方式联接,并通过由电子器件组成的调节系统自动调节电磁滑差联接 装置的励磁电流而实现的。这种系统的特点是结构紧凑、运行可靠、调节精度较高、控制简 单方便。本文介绍了通过实验获得的某些性能结果,并对这种系统用于风力发电的可能性提 出了探讨性的看法。

 
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