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Since the survey of Lindner and Rosa in 1978, one of the interests in the area of 3-designs has focused on establishing the existence of Steiner quadruple systems with a prescribed automorphism group.

Lindner和Rosa在1978年对斯坦纳四元系及其相关问题做了一篇综述。

Controlled attention, when it is focused on the object of your definite major purpose, is the medium by which you positively apply the principle of autosuggestion.

当你控制注意力，使它集中在明确的主目标上，你就可以以它为媒介，积极地应用自我暗示的原理。

The general analysis is focused on insulation level of the autotransformer neutraland the entrance of the autotransformer after small reactance grounding. In addition, the impedancevalue of the small reactance, the protection of the neutral and autotransformer entrance, and insulation coordination is particular discussed.

本文将对500kV 自耦变中性点由直接接地改成经小电抗接地的方式后，在多种不同的运行方式下，对其中性点、主变入口处上出现的过电压进行了详细全面的分析，并在此基础上对中性点电抗器的小电抗取值、主变中性点和主变入口处的过电压保护和绝缘配合问题进行了探讨。

It is focused on the discussion of process parameter such as temperature, reaction period, and substrate concentration in autoxidation of o-nitrotoluene in alkali system, and the yield of o-nitrobenzalhyde is 30% under optimum condition.

论文着重讨论了碱性条件下，氧气氧化邻硝基甲苯的反应，得出了温度、时间、底物浓度、氧气流量等一般工艺参数对反应的影响，得出在较佳条件下，邻硝基苯甲醛的收率可达30％左右。

It is focused on the discussion of process parameter such as temperature, reaction period, and substrate concentration in autoxidation of o-nitrotoluene in alkali system, and the yield of o-nitrobenzalhyde is 30％ under optimum condition.

氧气氧化邻硝基甲苯的反应，得出了温度、时间、底物浓度、氧气流量等一般工艺参数对反应的影响，得出在较佳条件下，邻硝基苯甲醛的收率可达30％左右。

This article is focused on the use of Mathematica graphics functions to perform some abstract concept of mathematical analysis, the conclusion of the understanding; auxiliary function for the extreme value; and its application in the series.

本文主要讨论的是利用Mathematica的绘图功能来演绎数学分析中某些抽象的概念、结论的理解；辅助求函数的极值；和它在级数中的应用。

It is shown that the spectrum of the axial points in the focused field is quite different from that of the incident light.

研究结果表明：即使在自由空间，空间相干度的变化都能引起显著的光谱变化。

This project has focused on the decidability problem and the axiomatization problem for LTLC, and the formal verification methods for real-time systems.

本项目研究了LTLC的可判定性、公理化及实时系统的形式验证等相关问题： 1。

In this essay, we summarized the characteristics of molecular marker-assisted selection, focused on improving qualitative and quantitative characters, backcross breeding and gene polymerization. At the same time, the problems and potential prospects of molecular marker-assisted selection have also been discussed.

综述了分子标记辅助选择的特点，重点介绍了分子标记辅助选择在水稻育种上的利用现状，主要包括质量性状改良、数量性状改良、回交育种、基因聚合等方面的应用进展，同时讨论了该技术存在的问题以及发展前景和展望。

However, in the past few years, because of the phenomena of big prescription, backhander of drugs became more and more popular, drugs expenditure covered major part of medication charge, so medication problem has been a social-focused problem.

但是，近年来，由于大处方、回扣药等不合理现象普遍存在，药品在医疗费用中所占比例过高，使药品问题已成为社会关注的热点问题。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。