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  previous three
     100 weather stations and 17 major weather elements in Shaanxi province are analysed. As a result, the rate of accumulation of the previous three major elements reaches 88.8%.
     对陕西省100个站、17个气候要素进行主成分分析,结果前三个主成分的累积贡献率达88%。
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     Based on the previous three major elements, Shaanxi Province is classified into three stage climatic provinces in which there are 5 climatic subzonations, 11 weather zones and 26 weather subzones.
     并由前三个主成分的分布将陕西省划分为5个气候亚带11个气候区26个气候小区。
短句来源
     In the last stage, the subject sets out from an overview and makes the final construction and integration according to the previous three stages, resulting in a complete contextual hypothesis which in turn offers the premise for cognitive inferences.
     在第四阶段,主体从综观的角度出发,根据前三个阶段,做出最后的建构整合,以形成一个完整的语境假设,为主体进行认知推理提供前提。
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     Concluding the selection effects on the previous three generations of Wanxi white pig.
     总结皖系白猪前三个世代的选择效果。
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     Integrated with the result of previous three parts, the fourth part summarizes the feature of Sino-Japan trade in the Northeast of China region in that period, and the resulting significance.
     在第四部分中结合前三个部分的分析,总结概括了这一时期东北地区中日贸易的特点及其所产生的影响。
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  the first three
     The Uu infection rates among 4 groups were 62.36%, 63.25%, 66.67% and 40.00% respectively. From group I to group III, the infection rates were no obvious difference among them, but the rate of group IV was significant lower than those of the first three groups (P <0.05).
     4组解脲支原体感染率分别为62.36%、63.25%、66.67%、40.00%,组Ⅰ ̄Ⅲ3组间感染率差异无显著性,而组Ⅳ感染率明显低于前三个组(P<0.05)。
短句来源
     Satt 281、Satt 373 and Satt462 are the first three of biggest.
     Satt 281、Satt 373和 Satt462是等位变异数较多的前三个位点,其遗传多样性也较大。
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     The first three phasesfocus on the enterprise information integration, and in the last two phases enterprisecomputer application is rnter-enterpnse information integration.
     前三个企业计算机应用阶段主要是企业内部信息集成,从供应链管理技术的应用开始,企业的计算机应用已经进入跨企业(或者称为企业间)的信息集成。
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     The accumulative variance contribution of the first three principal components was 35.7%. The first principal component encompassed only 20.22% of the total variation.
     主分量分析得到的前三个主分量的累计方差贡献率为35.7%,第一主分量的方差贡献率为20.22%。
短句来源
     Examination of the major factors for 17 climatic elements at 100 weather stations of Shaanxi Province shows that the accumulative contribution rate of the first three major factors comes to 88.8 percent.
     对陕西省100个站、17个气候要素进行主成分分析,结果前三个主成分的累积贡献率达88.8%。
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  the fore three
     This is the fifth paper of the serial studies of a new theory of impedance cardiograms purposedby us,In the present paper,we analyze five main reasons which cause tke deviations of Nyboer-Kubicek theory re-sults and clinic experimental results,give some modifications to the original model accorging to the fore three reasons,Furthermore,a new theory of impedance cardiograms is represtented and some primary discussions aboutthe new theory are given.
     本文是我们建立心阻血流图新理论的系列研究之五。 本文分析了造成Nyboer-Kubicek理论与实测结果相差较大的五个主要原因,并针对其中前三个原因,修改了原有的物理模型,得出了一种心阻血流图的新理论;
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  “前三个”译为未确定词的双语例句
     The stream quality at three headwater application points before treatment had mean pH = 4.63, 4.50, and 4.60, while the respective mean net acidity values were 16.40, 1.60, and 12.84 mg/L.
     处理前三个水源施加点的水质pH平均为4.63,4.50和4.60,净酸量平均为16.40,1.60和 12.84mg/L。
     the mean coefficient of variation of peak height were measured:0.67±0.19%and 2.76±1.02%, and the C. V. of retention time of all compounds was 0.33±0.10%.
     前三个化合物峰高变异系数0.67±0.19%,后三个峰为2.76±1.02%,所有保留时间的平均变异系数0.33±0.10%。
短句来源
     Accumulation contributionrate of the front three principal components about main pests and natural enemies were 94.13% and 89.48% respectively.
     主要害虫和主要天敌的前三个主分量的累计贡献率分别达到94.13%和89.48%。
短句来源
     Injury rates of common hepatic duct, porta hepatis duct, high bile duct and common bile duct were 92 3%, 88 5%, 89 6% and 36 9%, respectively.
     损伤部位再手术率 :肝总管、肝门部胆管、高位胆管分别为 92 3 %、88 5 %、89 6 % ,三者无显著差异 (P >0 0 5) ,而胆总管损伤再手术率最低 36 9% ,与前三个部位再手术率相差非常显著 (P <0 0 1 )。
短句来源
     Ppeak was lowest in SN group and highest in S group at the former three time points (P<0.05).
     Ppeak在前三个时点则有相反变化,即SN组最低、S组最高,有显著统计学意义,(P<0.05)。
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  previous three
Children 7 to 12 years of age were asked to indicate events they had experienced in the previous three months in a questionnaire devised for the study.
      
Only 3.1% of the children had visited health professionals for psychiatric problems during the previous three months.
      
They and their families had migrated to Greece within the previous three years.
      
The previous three kinds of boundary integral equations with indirect unknowns are discussed thoroughly and it is shown that all previous results are not EBIE.
      
Results also reconfirm the salt tolerance relationship established in the previous three years of the field trial.
      
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  the first three
If the diameter of fine roots was defined as being smaller than 0.5 mm, the first three orders of F.
      
Contour plots of normalized crack location versus normalized crack size were plotted by using the first three natural frequencies as the inputs.
      
Intra-abdominal pressure (IAP) was measured in the first three days after surgery by using the urinary bladder technique.
      
Hemodynamic variations were recorded in the first three postoperative days between group ARF and group NO-ARF.
      
Two decreases in chymotrypsin-like activity of the proteasome pools were recorded during the first three weeks after birth.
      
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Forty five albino rats, anaesthetized with urethane, were injected with guanethidine 10 mg/kg. They were divided into 6 groups. One group served as control. Three groups were killed respectively at 2 min, 10 min, and 2 hr after an intravenous injection. The other two groups were killed at 24 and 48 hr respectively after an intraperitoneal injection. The catecholamine contents in the adrenal glands, aorta, heart, spleen, and kidneys were determined by biological assay. The results revealed that the amount of...

Forty five albino rats, anaesthetized with urethane, were injected with guanethidine 10 mg/kg. They were divided into 6 groups. One group served as control. Three groups were killed respectively at 2 min, 10 min, and 2 hr after an intravenous injection. The other two groups were killed at 24 and 48 hr respectively after an intraperitoneal injection. The catecholamine contents in the adrenal glands, aorta, heart, spleen, and kidneys were determined by biological assay. The results revealed that the amount of noradrenaline in the aorta ran almost parallel to the 3 phases of blood pressure changes, but not the catecholamine contents in other organs. The contents of noradrenaline in aorta, heart, and spleen were nearly depleted at the end of 24 hr, when the blood pressure came down to the lowest level. It is supposed that the chronic phase of hypotension caused by guanethidine is due to the noradrenaline depletion in the organs innervated by sympathetic nerve endings.

本文用45只烏拉坦麻醉大白鼠,分别于注射胍乙啶10毫克/公斤后的2分钟、10分钟、2小时、24小时及48小时(前三个时間是靜脉注射,后两个时間是腹腔注射),記录血压,并取出腎上腺、胸主动脉、心、脾及腎,测定CA含量。血压变化的三个时相与主动脉壁NA含量似有平行关系,但与其他各器官CA含量无明显相关;胍乙啶后期降压机制是使交感神經末梢所支配的器官內的NA排空的結果。

In this paper,we have shown that the coefficients of LCAO MO of molecules withperiodical structures can be splitted into two factors,one indicating the positions andthe other the physical properties of the atoms.The first factor is called the geometricalfactor,and the second the physical factor.In terms of these factors,the quantumchemical calculations of molecular orbitals and energy levels axe greatly simplified.We have calculated the LCAO MO and energy levels of coronene and polycene;and have given the simplifid...

In this paper,we have shown that the coefficients of LCAO MO of molecules withperiodical structures can be splitted into two factors,one indicating the positions andthe other the physical properties of the atoms.The first factor is called the geometricalfactor,and the second the physical factor.In terms of these factors,the quantumchemical calculations of molecular orbitals and energy levels axe greatly simplified.We have calculated the LCAO MO and energy levels of coronene and polycene;and have given the simplifid secular equations for polyphenyl and peri-condenseddiphenyl.

本文指出,具有周期性结构的共轭分子 LCAO MO 分子轨道系数可以分解为两个因子,一个为反映原子轨道的几何位置的相位因子,一个为反映原子轨道的性质及原子结构情况的物理因子.相位因子是由原子在分子中的几何位置完全确定的因子.它可以容易地写出来.利用这个结果,可以使分子的久期行列式简化为周期性结构单元的久期行列式.本文还指出直链共轭分子可以当作单环共轭分子计算.我们计算了晕苯、聚省、聚苯及迫位稠合联苯等共轭分子的单电子能谱与分子轨道.前三个分子的计算同文献是一致的,后一个分子的计算未见文献报导.

After a brief review the electromechanical relations of a thin piezoelectric ceramic disc are derived by means of variational calculus,using the displacement distribution of infinitely thin one as primary approximation.It is pointed out that the Rayleigh correction for the resonance frequencies is exact at least to the term of the square of thickness-diameter ratio(h/2a)~2.Our experiments support this conclusion even in the case of strong electromechanical coupling for the values of h/2a up to about 0.17.The...

After a brief review the electromechanical relations of a thin piezoelectric ceramic disc are derived by means of variational calculus,using the displacement distribution of infinitely thin one as primary approximation.It is pointed out that the Rayleigh correction for the resonance frequencies is exact at least to the term of the square of thickness-diameter ratio(h/2a)~2.Our experiments support this conclusion even in the case of strong electromechanical coupling for the values of h/2a up to about 0.17.The thickness correction of the plane electromechanical coupling coefficient k_p is also obtained and discussed.Some tables and curves are given for the purpose of applications.A general analysis of the radial vibration of a thin disc having central hole is dealt with in the appendix.

首先就无限薄圆板情形,对特征方程精确数值求根,得到径向模前三个特征值以及由和σ求 k_p,(可达0.8)的计算表格。然后以无限薄圆板的位移分布作初级近似,利用变分原理讨论了有关机电关系的厚度修正问题。推导表明,所谓共振频率的瑞利修正公式乃是所得特征方程的精确到(h/2α)~2的近似解。用机电偶合较强的压电陶瓷圆片所作实验表明,即使忽略各向异性,共振频率的瑞利厚度修正关系已很满意。给出了由 f_(r2)/f_(r1)求算σ的厚度修正曲线,可以看出该关系对厚度修正较敏感。至于求算 K_p 关系的厚度修正,给出了相对修正⊿k_p/k_p 精确到(h/2_α)~2项的表式,实例表明,一般此项修正量不大。文末还就中心开孔圆板的径向振动作出一般的分析。

 
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