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     To expound links and ways of transforming the science and technology in knowledge form into productive forces in material
     试论知识形态的自然科学技术向物质生产力转化的途径和环节(Ⅱ)
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     Three Important Links To Realize Industrialization of Information Research
     实现情报研究产业化的三个重要环节
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     Some Key Links in Party Building among College Students
     高校学生党建工作的几个重要环节
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     THREE LINKS IN FOSTERING STUDENTS'PHYSICAL EDUCATION CAPABILITIES
     培养大学生体育能力的三环节
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     The Design Flow Charts and the Design Quality Control Links for Merchant Ships
     民用船舶设计流程及其质量控制环节
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     Experimental Investigation of 40 Gb/s Transmission Based on 10 Gb/s Transmission Links
     基于10Gb/s传输链路的40Gb/s光传输实验研究
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     A 40 Gb/s optical transmission based on th e NSFCNet 400 km×10 Gb/s system is realized without any bit error rate (BER) floo r. It is shown that typical 10 Gb/s systems of middle or short distance can be u pgraded to 40 Gb/s directly without change the transmission links.
     基于中国自然科学基金网(NSFCNet)的400 km×10 Gb/s光传输链路实现了40 Gb/s光传输,没有出现误码率(BER)平台,说明在常规的中短距离10 Gb/s系统可以直接升级至40 Gb/s系统,而不需要升级传输链路
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     Analysis and calculation of CATV Optical Links
     CATV光链路的分析与计算
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     RELIABILITY ANALYSIS OF 2D-TORUS WITH FAILURE-DEPENDENT LINKS
     具有失效相关链路的2D-Torus网络的可靠性分析
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     In this paper, a Dynamic Shared-Path Protection (DSPP) algorithm is proposed for double-link failures in WDM mesh networks on the condition that all links are assumed to be Share Risk Link Group (SRLG) disjoint.
     该文研究了WDM网状网中双链路失效问题,在假定所有链路共享风险链路组(Share Risk Link Group, SRLG)分离的条件下,提出了一种动态共享路径保护(Dynamic Shared-Path Protection,DSPP)算法。
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     Experimental construction prospects for the use of 225KV—600MVA links using polyethylene insulated cbles with foreed external water cooling
     引进线用的225千伏实验电缆
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     Application of Binary Links in Spatial Mechanisms
     双动杆在空间机构综合中的应用
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     Design of VHF/UHF Radio Links Communication for Remote Area Pipelines
     管道遥远地区通信的VHF/UHF无线电线路设计
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     Voltage Response and RF Impedance to External Radiation for Superconducting Weak Links
     超导弱连接对外辐射的电压响应及RF阻抗
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     RESISTIVE TRANSITION IN TWO-DIMENSIONAL ARRAYS OF PROXIMITY-COUPLED SUPERCONDUCTING WEAK LINKS
     邻近效应耦合的二维超导阵列的电阻转变
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In the case of 4-dimensional anticommutative algebras a construction is given that links the associated cubic surface and the 27 lines on it with the structure of subalgebras of the algebra.
      
Bionic knee joint with closed-chain 4links makes robot walking more humanlike, but the model is complex and tracking of the bionic leg to the artificial leg is more difficult.
      
Asynchronous contacts become the basic way of communication in such kind of network instead of data links in traditional ad-hoc networks.
      
Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links
      
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The crystal structure of the addition product of acrolein with sodium bisulfite has an ortho-rhombic unit cell with a=18. 24,b=7. 05and c=4. 77,which contains 2[CH_2CHCHO·2NaHSO_3·4H_2O].The space group is very likely D_(2h)~(13) -P(2_1/m)(2_1/m)(2/n).However,the related spacegroup C_(2v)~7. is not yet conclusively excluded.The parameters of SO_3 groups and Na atoms were derived mainly from selected Patter-son sections.On basis of the above parameters,Fourier method was applied to locate lighteratoms (Fig.3,4,5)...

The crystal structure of the addition product of acrolein with sodium bisulfite has an ortho-rhombic unit cell with a=18. 24,b=7. 05and c=4. 77,which contains 2[CH_2CHCHO·2NaHSO_3·4H_2O].The space group is very likely D_(2h)~(13) -P(2_1/m)(2_1/m)(2/n).However,the related spacegroup C_(2v)~7. is not yet conclusively excluded.The parameters of SO_3 groups and Na atoms were derived mainly from selected Patter-son sections.On basis of the above parameters,Fourier method was applied to locate lighteratoms (Fig.3,4,5) .The structure thus derived reveals that the addition product in question isa racemic 1-hydroxy-propane-1,3-disulfonate (Fig.2) .The bonds within a disulfonate ion areappropriate covalent bonds (Fig.6) .Water molecules link with each other and with di-sulfonate ions through hydrogen bonds (Fig.7) .The sodium ions are coordinated octahedrallyby oxygen atoms (Fig.8) .It is surprising that in the case of C_(2v)~7 or D_(2h)~(13) ,the theory of spacegroups reguires the asymmetric disulfonate ions to sit on a mirror plane or a pair of mutuallyperpendicular mirror planes respectively.This anomaly is understandable in terms of disorder(Fig.9 and 10) .

丙烯醛亚硫酸氢钠加合物,(CH_2=CH-CHO·2NaHSO_3·4H_2O)的空间群为 D_(2h)~(13) -P2_1/m 2_1/m 2/n,每个晶胞中含有2个克式量的加合物,正交晶胞的参数为 a=18. 24,b=7. 05,c=4. 77。从 Patterson 函数 P u,0,w),P(u,1/4,w)和 P(u,0. 35,w)中引出 SO_3 团和钠原子的参数。从上述参数合成了 Fourier 投影ρ(x,y)和 P(x,z),得出整个结构的模型和参数。根据这些参数合成的 Fourier 切面ρ(x,1/4,z)进一步确定了上述结构模型。上述结构分析的结果指出:(1) 丙烯醛加合物是1-羟基丙烷-1,3-二磺酸的钠盐,Na_2[O_3SCHOHCH_2CH_2SO_3] ·4H_2O;(2) 二磺酸根离子中的 C-S=1. 78(平均长度),S-O=1. 42(平均长度),其余的数据和一般共价单键者很接近;(3) 钠离子处在磺酸根和水分子的氧原子形成的八面体配位中;(4) 水分子以氢键填充在分布於和(010) 平行的层中的二磺酸根离子间的空隙中,而钠离子通过它的氧原子配位使各二磺酸根离子...

丙烯醛亚硫酸氢钠加合物,(CH_2=CH-CHO·2NaHSO_3·4H_2O)的空间群为 D_(2h)~(13) -P2_1/m 2_1/m 2/n,每个晶胞中含有2个克式量的加合物,正交晶胞的参数为 a=18. 24,b=7. 05,c=4. 77。从 Patterson 函数 P u,0,w),P(u,1/4,w)和 P(u,0. 35,w)中引出 SO_3 团和钠原子的参数。从上述参数合成了 Fourier 投影ρ(x,y)和 P(x,z),得出整个结构的模型和参数。根据这些参数合成的 Fourier 切面ρ(x,1/4,z)进一步确定了上述结构模型。上述结构分析的结果指出:(1) 丙烯醛加合物是1-羟基丙烷-1,3-二磺酸的钠盐,Na_2[O_3SCHOHCH_2CH_2SO_3] ·4H_2O;(2) 二磺酸根离子中的 C-S=1. 78(平均长度),S-O=1. 42(平均长度),其余的数据和一般共价单键者很接近;(3) 钠离子处在磺酸根和水分子的氧原子形成的八面体配位中;(4) 水分子以氢键填充在分布於和(010) 平行的层中的二磺酸根离子间的空隙中,而钠离子通过它的氧原子配位使各二磺酸根离子层连接起东;(5) 在每个二磺酸根离子中,羟基可以机遇地分布在四个等同的 a 位置上:(6) 晶体含有同数的1-羟基丙烷-1,3-二磺酸根离子的对映体;(7) 晶体中的水分子亦参与使晶体取得 D_(2h)对称性的无序现象。本工作使醛的亚硫酸氢盐加合物是 a 羟基磺酸盐的观点取得了新的、富有说服力的论证。

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf...

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf sheath and spike,particularly the bristle,while that onthe "green-stem" varieties was the yellowing of the leaf blade.In all instances,thediscoloration was usually accompanied by shortening of internode,stunting of thewhole plant.wrinkling of leaf surface,slight waviness of leaf margin,deformationof spike and underdevelopment of root systems.Plants infected at an early stagewere severely stunted and on heads were produced. It has been demonstrated that the red-leaf disease of the foxtail millet was causedby a virus readily transmitted by at least three different species of grain-infestingaphids:corn aphid,Rhopalostiphum maidis Fitch;grain aphid,Macrosiphum granari-um Kirby;and green-bug,Toxoptera graminum Rond.Tests with non-viruliferouscorn aphid eliminated the possibility of direct aphid injury as the cause of the disease. ??The virus was not transmissible by mechanical inoculation,by seeds nor through thesoil. Studies on the mode of transmission of red-leaf virus by corn aphid indicatedthat the virus was persistent in its insect vector and could infect in succession aseries of at least 27 tested millet seedlings.The aphid was unable to acquire thevirus in a 5-minute feedling period on the virus source but was able to pick up thevirus in 10-minute period.The 8-hour acquisition feeding period was optimum forthis aphid.The testing feeding period was found to be not more than 5 minutesand a 4-hour period of confinement on the diseased plant was ample for the aphidto cause maximum infection.Attempts to transmit the virus with cotton aphid.Aphisgossypii Gloner peach aphid,Aphis persicae Sehult and soybean aphid,Aphis glycinesMats,have given negative results.The incubation period for symptoms of the red-leaf virus in foxtail millet ranged from 10 to 32 days with the model period beingbetween 14 to 20 days. Under natural conditions,certain cultivated cereals and grass weeds showed thesymptoms resembling the red-leaf disease of foxtail millet.Among them,were ZeaMays L.,Panicum miliaceum L.,Setaria lutescens (Weigel) Hubb.,S.viridis (L.)Beauv.,Digitaria sanguinalis (L.) Scop.Echinochloa crusgalli (L.) Roem.,Eragrostiscilianensis (All.) Link,E.pilosa (L.) Beauv.,Arundinella anomala Steud,Spodiopogonsibiricus (Steud.) Trin.,Bothruochloa ischaemum (L.) Keng.,Capillipedium parviflor-um (R.Br.) Stapf and Poa practensis L..Artificial inoculation with the corn aphidproved that the first six named plant species,including the two cereals,were susce-ptible to the red-leaf virus and they produced,in all cases,the typical symptoms.Tests with the rest sexen grass weeds are in progress. The results of disease control experiments by timely spraying with an insecticide,E605,under field conditions were inconsistent.Among the 349 foxtail millet varie-ties of foxtail millet examined in the experimental field,nine of them were foundto be highly torelant to and suffered only very slightly from the attack of the red-leaf virus.These varieties were,however,succeptible in aphid transmission experiments. Available evidences point to the conclusion that the red-leaf virus of the foxtail millet herin reported is quite different from all the previously described cereal viruses.Among the cereal virus that closely resembles the red-leaf virus is the yellow-dwarfvirus reported by Oswald tnd Hauston.These two viruses are similar in the follow-ing respects:both are transmissible by the same species of aphids (Rhopalosiphummaidis,Microsiphum graminium andToxoptera granarium) and neither virus can betransferred mechanically.But they differ strikingly from each other in their hostranges.According to Oswald and Hauston,there were 19 of 55 grasses tested thatappeared to be immune from the yellow-dwarf virus.Digitaria sanguinalis,Echino-chloa crus-galli Setaria viridis and Zea Mays were among the immune hosts.On thecontary,all these four gramineous plants were found to be extremely susceptible tothe red-leaf virus both under natural condition and in artificial inoculation experi-ments.Accordingly,the red-leaf,a persistent aphid borne virus affecting the foxtailmillet,is herein reported as a new virus of the cereals.

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油...

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油芒均感染小米紅叶病病毒。其它紅化杂草和接种試驗,正在进行中。紅叶病病毒对小米植株所产生的影响,因植株發育的阶段不同而輕重有所差异,植株感病愈早病害愈剧烈。用杀虫剂E605在田間噴射小米防治紅叶病,未能表現药剂有防病的效能,在田間观察349个品种,选得9个高度耐病和农艺性状优良的品种。抗病选种可能是当前防治小米紅叶病最有效的防治措施。根据病原的傳染方法,寄主范围和所表現的症状,小米紅叶病病毒和以往所报道的禾本科植物的病毒病害的病毒均不相同,因此它是禾谷类作物的一个新的病毒。

In anesthetised cats and dogs,sodium antim- ony tartrate,12 mg/Kg intravenously,could mark- edly diminish the intensity of the following circ- ulatory reflexes:the pressor reflexes on occlusion of the carotid artery and on injection of nicotine into the splenic vessels,the pressor and depressor effects on electric stimulation of the central stu- mp of the vagus (vago-sympathetic in dogs).On further analysis,it was found that the antimony compound did not significantly effect either the corresponding actions...

In anesthetised cats and dogs,sodium antim- ony tartrate,12 mg/Kg intravenously,could mark- edly diminish the intensity of the following circ- ulatory reflexes:the pressor reflexes on occlusion of the carotid artery and on injection of nicotine into the splenic vessels,the pressor and depressor effects on electric stimulation of the central stu- mp of the vagus (vago-sympathetic in dogs).On further analysis,it was found that the antimony compound did not significantly effect either the corresponding actions of the mediators including acetylcholine and adrenaline,or the transmission in the vagal and sympathetic ganglia and their peripheral endings.It was,therefore,most pro- bable that the antimony compound acted on cent- ral links in the reflex arcs of all these circulatory refllexes.In some of these,its depressant action on the liberation from the adrenals might also play an important role.

于麻醉犬猫进行实验,发现酒石酸锑钠12mg/Kg 静脉注射能显著减弱下列数种循环反射:夹颈动脉与脾臓血管内注入烟碱所致的升压反射,电刺激迷走神神向中段所致的升压反射与降压反射。进一步分析证明,锑剂并不影响植物神经介质乙醯胆碱与肾上腺素的有关作用,也不影响迷走神经节与交感神经节以及它们节后纤维末梢的传导。因此,锑剂在以上循环反射的反射弧中,最大可能即作用于其中枢环节,即有关的皮质下中枢,此外对于肾上腺髓质的抑制作用亦有重要的意义。

 
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