查询词典 four-fold

In this study, the CPE processes of four different kinds of polyaromatic hydrocarbons, acenaphthene, anthracene, phenanthrene and pyrene, with two kinds of silicone surfactants, DC-193 and DC-190, were studied separately, and four different assisting methods for the phase separation of the CPE process including heating at a higher temperature, adding salts, centrifugation and stirring were introduced, respectively.

今利用两种聚醚型有机硅表面活性剂DC-193和DC-190，对蒽、菲、芘和苊四种多环芳烃进行浊点萃取研究，分别使用加热、加盐、离心和搅拌等辅助方法改变相分离过程的速度。通过测定表面活性剂富集相的体积百分率Vs/随时间的变化和最终的萃取率，研究上述四种不同辅助方法对相分离行为和萃取性能的影响。

The adjoint operator method and the theory of normal form are used to investigated the normal forms in the four dimensional nonlinear systems with cubic nonlinearities. We give two methods to compute the normal form for the four dimensional nonlinear systems. The corresponding Maple programs are also given in the appendix. The results obtained in this dissertation have a completely agreement with the results obtained in other papers.

利用共轭算子法和规范形理论研究了含有三次非线性项的四维系统的规范形，给出了计算四维非线性规范形的两种算法，给出了相应的Maple符号推导程序，所得到的结果与其它文献所得结果完全一致。

If we add together the three great poems of antiquity -- the twenty-four books of the Iliad, the twenty-four books of the Odyssey, and the twelve books of the Aeneid -- we get at the dimensions of only one-half of The Faerie Queen.

如果我们加在一起的三个古代伟大的诗-对伊利亚特，在奥德赛的04年书，和埃涅阿斯纪的12个图书24书籍-我们只在一半的尺寸得到女王的仙灵。

General symptoms such as purpure in mucous membrance and skin, bleeding of internal organs, decreasing of weight and bad mental state caused by modeling were well improved in four control groups (Chinese traditional medicine group, western medicine group, PG original formula group and PG major formula group), the peripheral PLT was increased, spleen weight and its action of phagocytosis and damage to PLT were both decreased, morrow megakaryocytes differentiation and maturation were improved and hyperplasia descended, which showed significant differences compared with the model group. Differences among the four control groups were not significant. The optimal dose ratio of PG major formula was finded out with homogeneous design software UST3.0 and multiple regression: Astragalus root 48g, Rhubarb 15g, peach kernel 1Og, Agrimony 24g.

结果：模型建立成功；中、西药对照组、紫癜颗粒核心方组与原方组小鼠对于免疫法造模所引起的皮肤粘膜紫癜、内脏出血、体重减轻、精神状态差等一般症状均有较好的改善；小鼠的外周血小板计数得到提高；脾脏均重及对血小板的吞噬破坏降低；骨髓巨核细胞分化成熟程度增高，增生活跃度降低，与模型组相比较，均有显著性差异，四个对照组之间无显著性差异，利用均匀设计UST3.0统计软件分析，进行多元逐步回归处理，筛选出紫癜颗粒核心方的最佳剂量配比为黄芪48g，大黄15g，桃仁10g，仙鹤草24g。

During the postgenomics era the information about genomic sequence and gene functions provides a new foundation for evolutionary biology and ecology As the first whole-genome sequenced plant Arabidopsis thaliana and its wild relatives have played a critical role in understanding the evolution of genomics and speciation Both A halleri and A lyrata are closely related to the model species A thaliana A halleri ssp gemmifera occurs in northeastern China Japan and Taiwan; while its sister A halleri ssp halleri is mainly distributed in Europe Geographical barriers such as Tienshan Mountain Range isolate these intraspecific sisters Likewise A lyrata ssp kamchatica and ssp lyrata occur in East Asia and North America respectively Such distribution patterns seem to be consistent with allopartic speciation The comparison between ancestral and extant polymorphism by multilocus can be informative about the population genetics of speciation In this study we collected and analyzed DNA sequences of 98 genes from four wild relatives of A thaliana A halleri ssp gemmifera A halleri ssp halleri A lyrata ssp kamchatica and A lyrata ssp lyrata The ancestral states of these four species were compared to each other in terms of level of genetic variation However the ancestral species at the time of speciation were substantially more polymorphic than the extant geographical populations The observations are not fully compatible with speciation by strict allopatry At some species pairs parapatric speciation seems more reasonable in speciation of Arabidopsis The 98 gene sequences are also used for the congruence test between gene genealogy and species phylogeny Only 28 genes support the species phylogeny but there are 23 genes supports another major genealogy { lyrata} thaliana Based on the phylogenetic position change of A lyrata ssp kamchatica and Ks value for each species pair suggested the recent directional gene flow between A halleri ssp gemmifera and A lyrata ssp kamchatica

阿拉伯芥是第一个完成基因体定序的开花植物，其基因体资讯提供植物学研究的重要依据；在解析阿拉伯芥属物种的亲缘关系以及种化机制等重要的演化议题时，阿拉伯芥近缘的野生物种自然成了不可或缺的关键；跟阿拉伯芥近缘的物种包括A halleri及A lyrata，其中A halleri ssp gemmifera主要分布於中国东北、日本以及台湾，与近缘的A halleri ssp halleri其分布於欧洲隔著天山及大陆的障蔽，而A lyrata ssp kamchatica主要分布於东北亚及台湾，与分布於北美五大湖的A lyrata ssp lyrata被北极圈所分隔，这样的分布模式暗示异域种化的可能。藉由多基因分析比较祖先物种与现生物种遗传歧异度的相关可提供讯息探讨种化时期的族群遗传结构，本研究针对A halleri ssp gemmifera、A halleri ssp halleri及A lyrata ssp kamchatica、A lyrata ssp lyrata四个物种，两对互为亚种的姊妹群，以阿拉伯芥为外群进行研究，在四个物种完成98个同源基因的分子序列，利用套装软体MCMCcoal来估算祖先物种的遗传变异，亦估算现生物种的核苷酸歧异度，观察到？多物种配对中祖先物种遗传多型性大於现生物种DNA歧异度，显示异域种化模型并无法完全解释阿拉伯芥属物种的种化模式，在某些物种配对间邻域种化模式应比异域种化更为可能；在基因树与物种树的比较，98个基因片段的亲缘模式只有28个是与已知物种树一致的，有23个基因其树状图支持{ lyrata} thaliana的型式，藉由kamchatica位置的变化以及估算各物种配对间的平均同义置换率，推测在A halleri ssp gemmifera与A lyrata ssp kamchatica间具有近代的单方向基因交流。

During the following eight sessions in four weeks the subjects were randomly devided into four groups:(1) physical practice group, repeated physical practice twenty times per session,(2) alternating mental-physical practice group, alternating the techinques of physical and mental practice per session,(3) mental practice group, watching the film and listening to the instruction of badminton backhand lowservice,which was followed by five minutes in which the subjects were directed to practice the serve skills mentally for twenty repetitions per session, and (4) control group, no practice.

所有受试者接受羽球反手发短球之教学及练习后，隨机分派到下列四种不同练习组：22身体练习组：每天次练习羽球反手发短球二十次；4综合练习组：身体练习、心智练习间隔交替练习；3。心智练习组：提供羽球反手发短球击球动作录影带及指导语，受试者在五分钟內意像整个动作过程，共计二十次；6控制组：不练习。

In addition to four nmerac place position,there are three zone bit positions in a 7-bit code,and four zone bit in an 8-bit code.The 7-bit American Standard Code for Information Interchange is widelu used in data communication work and is bu far the most popular code used to represent data internally in personal computers.

除了4位数字位之外，在7位编码中有3个标志位，而在8位编码中则有4个标志位。7位美国信息交换标准代码广泛地用于数据通信，而且是目前个人计算机内部数据表示中最为流行的代码。

In addition to the four numeric place positions, there are three zone bit positions in a 7-bit code, and four zone bit positions in an 8-bit code: The 7-bit American Standard Code for Information Interchange is widely used in data communications work and is by far the most popular code used to represent data internally in personal computers.

因为64种可能的位排列仍不能满足十进制数（10个）、小写字母（26个）、大写字母（26个）和大量的其它字符（26个以上）编码的需要，所以设计者将6位BCD码扩充到7位和8位。7位二进制数可以提供128种不I司的排列(2 ')；8位二进制数可以有256种排列（2）。

We divided sperm count of infertile men 296 in the latest four years into four groups: 0, 1~5, 6~19 and more then 20 million/ml. The average age (p=.001), concentrations of luteinizing hormone(p=.001) and follicle-stimulating hormone(p=.000) of four groups were statistically significant differences.

研究结果显示，最近四年某教学医院不孕症患者296名，将精子浓度分为0、1~5、6~19及大於等於20 million/ml四组，其年龄（p=。001）、黄体激素（p=。001）及滤泡激素（p=。000）平均值之间均有显著差异。

Japan by Hokkaido, Honshu, four countries, the Nine Provinces, four islands and the south Ryukyu Islands, the bonin islands and North Four Islands and so on more than 3000 islands is composed, the area 377800 square kilometers, are equal to China 1/26, is close with our country Yunnan Province area.

日本由北海道，本州，四国，九州，四个岛屿和南部的琉球群岛，小笠原群岛和北方四岛等3000多个岛屿组成，面积377800平方千米，相当于中国的1/26，与我国云南省面积相近。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。