四对的

In accordance with the correspondence principle of medium?

根据中期旋回与准层序组相对应以及短期旋回与准层序相对应的原则，将广北 12 -斜 1井沙四段 1～ 4砂层组划分出 4个中期旋回，18个短期旋回，并运用旋回等时对比技术对广北地区进行了精细层序地层对

All of the methods are studied, especially,an experiment is done by the prism coupling method.

本文讨论了四种测量波导薄膜的有效方法，对各种测量方法作了分析研究，并着重对棱镜耦合法进行了实验研究。

Result: Quadruplet pregnancy was an extremely rare disease, accompanied with multiple complications during the perinatal period. Its major clinical feature was excessly large uterine, the definitive diagnosis of quadruplet pregnancy depended on ultrasonography. With reason able prenatal examination and prevention from the multiple complications during the perinatal period, the quadruplet pregnancy could had a similar outcome as single birth.

结果：四胎妊娠的发生率极低，围产期并发症多，临床表现主要为子宫过度增大，明确诊断主要依靠超声通过合理的产前监测和对围产期并发症的防治，四胎妊娠仍能取得和单胎妊娠一样的良好结局。

It is well reported that human telomeric DNA sequence [AGGG3] can form a well-defined quadruplex structure with the hydrogen bond between guanine bases in the appearance of K+ and Na+. It was reported that the formation and stability of the structure is meaningful for both gene regulation and apoptosis.

据文献报道，人类染色体端粒中的重复序列[AGGG3]可以在钠、钾离子存在的条件下通过四个G碱基间形成平面环状氢键从而折叠成四链结构G-quadruplex，此结构的形成与稳定对基因调控以及细胞的凋亡有着重要意义。

A19 lie poem of fixed form consisting of five tercets and a final quatrain on two rhymes , with the first and third lines of the first tercet repeated alternately as a refrain closing the succeeding stanzas and joined as the final couplet of the quatrain .

田园诗一种有固定格式的19行诗；由五个三行押韵的诗节和一个四行诗节组成，其四行诗节有二个韵，在第一个三行押韵诗节中，第一行和第三行作为结束后继诗节的重复句间隔地重复出现，并作为四行诗的结尾对句一起再现

A 19 line poem of fixed form consisting of five tercets and a final quatrain on two rhymes , with the first and third lines of the first tercet repeated alternately as a refrain closing the succeeding stanzas and joined as the final couplet of the quatrain .

田园诗：一种有固定格式的19行诗；由五个三行押韵的诗节和一个四行诗节组成，其四行诗节有二个韵，在第一个三行押韵诗节中，第一行和第三行作为结束后继诗节的重复句间隔地重复出现，并作为四行诗的结尾对句一起再现

Sequence comparison and phylogenetic analysis of mtDNA 16S rRNA and COI gene fragments in four species of razor shell were made using PCR and direct sequencing. The four species are Solen grandis Dunker, Solen strictus Gould and Cultellus attenuatus Dunker, Sinonovacula constricta.

本实验对帘蛤目四种蛏类大竹蛏，长竹蛏和小刀蛏和缢蛏的线粒体16S rRNA和COI基因片段部分序列进行了比较并对其系统学进行了初步研究。

Film executives and location and special effects personnel have just completed an updating recce of the four picturesque glens which have featured in all the previous Harry Potter blockbusters.

电影执行管理人员和外景及特效部门的工作人员近日刚刚完成了对苏格兰高地湖区Lochaber 的四个风景独特的峡谷的最新勘察，这四个峡谷在以往的所有HP电影里都出现过。

It is mainly used to control the second-generation schizont of coccidis with the activity peak to coccidis on the forth day.

尼卡巴嗪主要作用于球虫第二代裂殖体，对鸡虫的活性高峰期为第四天，即对第二代裂殖体活性最强。

The quaternion matrix singular value perturbation theorem is generalized and these results are also new one for complex matrix.

本文对四元数体上矩阵奇异值摄动定理给出了推广，且这些结果对复矩阵也是新的。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。