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The comprehensive track state managing method to reduce the rail cracks around the bolt holes is proposed based on the vehicle/track nonstationary random vibration analysis and the track transfer characteristic, and is further modified through the comprehensive dynamics experiment in a railway worksite and the rail strains analysis due to the rail-fishplate interaction and the compression of fishbolt to rail bolt hole.

基于轮轨非平稳随机振动分析和轨道动态传递特性研究结果，本文提出综合整治钢轨螺栓孔裂损的措施，并分析了钢轨鱼尾板联结和螺栓杆挤压造成的钢轨螺孔应变，结合现场轨道动力学试验，完善这些措施。

One of the strains of photosynthetic bacteria, Rhodopseuolomonas was isolated from the sediment of a fishpond.

从淡水养鱼池塘底泥中分离得到1株光合细菌。

Finally, Fitch is concerned by the greater potential for liquidity strains for some insurance companies.

最后，惠誉还对某些保险公司潜在的流动性过紧表示关注。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work.Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。2。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work. Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted. It was found in our drop tests that the root cause of lead-free solder joints under drop impact was the combined effect of mechanical shock and PCB bending vibration.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。

Ethods of maintenance for ME'COR pocket mirror.1.After use, it is essential that finger impressions and water strains be rubbed off timely with add-on mull to keep the mirror new.2.When not being used, the mirror shall be put into the flannelette bag to prevent it from oxygenation.3.Keep it away from hard material, in case it gets scratched.4.This product is supplied with anti-fog glass.

E'COR米卡化妆镜保养方法：1、产品使用后，用所配置的软布将手印和水渍及时擦掉以保持产品常新。2、产品闲置时，可放入绒布袋内，隔绝空气防止氧化。3、应尽量避免与硬物相刮，以免造成镜体划伤。4、本品所配置为防水防雾镜片，镜面上起雾时无需擦拭，雾水可自行褪去。

A multiplex PCR assay for detection of Escherichia coli O157:H7 was developed by using 3 sets of primers that specifically amplify segments of the rfbE、fliC and eaeA genes. The target genes fragment of the PCR assay were 291 bp, 625 bp and 368 bp, respectively. Analysis of 30 strains demonstrated that this PCR system was specific.

以编码大肠杆菌O157抗原的rfbE基因、编码H7抗原的fliC基因以及编码毒力因子的eaeA基因为靶基因，选择3对引物，建立并优化了检测大肠杆菌O157：H7的多重PCR体系，扩增产物分别为291 bp、625 bp、368 bp，采用30株细菌验证了该多重PCR具有特异性。

Methods Drug sensitivity tests of 2127 strains of P. aeruginosa isolated fom clinic between 1999-2007 to 18 kinds of antibiotics were analysed.

分析1999-2007年分离的2127株铜绿假单胞菌对18种β-内酰胺类抗生素的药敏结果。

Tinea manuum, tinea pedis, nail trauma, occlusive footgear were risk factors for onychomycosis in children. 64 strains of pathogenic fungi were isolated.

手癣、足癣、甲外伤、长期穿不透气的鞋袜是儿童甲真菌病的危险因素。

More malicious strains can make your computer issue random sounds or greet you with unexpected screen messages.in extreme cases,viruses can wipe out data,damage files or even perform a format of your hard disk.

然而某些恶意的病毒变异体可使电脑时不时发出声响，或者突然在屏幕上冒出个对话框跟你打个招呼。在极端的情况下，病毒会清除数据，损害文件，甚至格式化硬盘。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。