反复试验

We study the Electro-slag Welding Technique and its equipments, and use different materials to do some experiments, at last, we find a new method to produce the box frame members.

电渣焊在我公司属于新的技术也是难点，在国内其他厂家借鉴的技术也十分有限，通过研究电渣焊技术和设备，用不同材料的反复试验，工艺的不断摸索，终于探索出一套制作箱形构件的方法。

To study the seismic performance of this joint, a quasi-static experiment under low reversed cyclic load of three cross-shaped outer-shell joint specimens is carried out.

为研究该种节点的抗震性能，进行了3个十字形足尺构件的低周反复试验。

One progresses through everlasting experiment on the basis of ever-widening experience.

这是依靠不断积累的经验，通过长时间反复试验所取得的一个进步。

During those years, through trial and error, he formulated a directing style that made him one of cinema's first auteurs.

在这些年里，通过反复试验，他制定了一个指导的风格，使他成为电影的第一作者风。

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主要产品包括：一、拉力强度、万能材料试验机：微机控制万能材料试验机、经济型万能材料试验机、微电脑拉力试验机、电动/手动（立式/卧式/双杆/单杆）拉力台、微电脑插拔力试验机、弹簧拉压试验机等；二、环境试验机系列：恒温恒湿试验箱、干燥箱、大型负载老化室、步入式恒温恒湿试验室、冷热冲击试验箱、UV耐候试验机、盐水喷雾试验机、老化试验箱三、纸箱、包装、家私试验机系列：微电脑纸箱抗压试验机、破裂强度试验机、跌落试验台、微电脑振动试验台、模拟汽车运输振动试验台四、电工器材试验机系列：插头引线弯折试验机、插头滚筒试验机、插头线吊重摆动试验机、插头线静态拉力试验机、突拉试验机、电源线折曲试验机、燃烧试验机、90度剥离强度试验机、电线扭转试验机、电线耐磨损试验机、可挠电线柔软度试验机、电线印刷体坚牢度试验机、线材测长率试验机、听筒线伸缩疲劳试验机、插拔力试验机、低温冷挠试验机、温升试验机、电线恒温球压试验机、灼热丝试验机、漏电起痕试验机、线材的短路/断路/高压/低压/绝缘/导通/误配测试仪；五、计算机、手机试验机系列：转轴寿命试验机、手机翻盖寿命试验机、按键寿命试验机、耐磨擦试验机、全自动扭力试验机、手机跌落试验台、纸带耐磨试验机、鼠标滚轴寿命试验机；六、橡胶、塑料、胶带试验机系列：磨耗试验机、耐折/耐磨试验机、曲折试验机、垂直/反跳弹性试验机、永久压缩歪度试验机、泡棉压缩应力试验机、发泡塑料反复压缩试验机、试料磨平机、塑料熔融指数测定机、融点测试机、热变形温度试验槽、落球/落垂/杜邦冲击试验机、恒温胶带保持力试验机、胶带初粘性滚球试验机、硬度计，剥离强度试验机；七、制鞋、皮革、试验机系列：磨擦试验机、加硫试验机、输送式检针机、磨擦染色坚牢度试验机、双锤磨擦脱色试验机、标准光源箱、耐寒试验机

Eg:It seems schools may not be providing an opportunity for children to re-express their ideas and so have them tested and refined by teachers and their peers.

学校不可能给学生们提供机会反复试验他们自己的想法，所以就让老师和他们的同龄人来做这样地检验地工作

SBL-5: single and single-roll five three-roll combination models, this model than SBL-4 March 5 more than two sets of roller traction, the major manufacturers use of single lines and the importation of equipment, set the length of all home; Feedback combining the experience of each other, after hard of concentrated study and repeated experiments, developed a new type of unit, a multi-purpose machine, with the thickness width can be arbitrarily regulated, transparent belts, and can produce a variety of belt .

SBL-5型：单五辊和单三辊组合机型，这种机型比SBL-4型多2套三五辊牵引，运用各大厂家单机生产线和进口设备，集众家之长；结合用户反馈的经验，取长补短，经过辛勤的潜心研究和反复试验，研制出的一种新型机组，可一机多用，带的厚薄宽窄可以随意调节，透明带以及各种各样的带都能生产。

On the basis of the former researches and taking into account the practice of our country, this paper take the low period repeat loading experiment for three rigid conjunction node of steel beam and concrete wall, researching their load-bearing capacity and earthquake resistance performance under the low period repeat loading action, the main content concentrate on the following aspects:(1) Analyzing the three joint's damage shape、hysteretic curve、change of rigidity、yielding load、limit load、damage load、durability、energy dissipation capacity、the strain of the key position and the moment transferring mechanism.(2) Comparing the joint's load-bearing capacity and earthquake resistance performance among the joints with different stud bolt diameter and different connection plate thickness, researching some factor's influence on the work performance of the joint such as the high and strong stud bolt specification、connection plate thickness .

本文在前人研究的基础上，结合我国的实际情况，对3个钢梁-混凝土墙刚接节点试件进行了低周反复荷载试验，对其在低周反复荷载作用下的承载力和抗震性能进行了研究，内容主要集中在以下几个方面：(1)对3个节点试件在低周反复荷载作用下的破坏形态、滞回曲线特性、刚度变化、屈服荷载、极限荷载、破坏荷载、延性性能、耗能能力、关键部位的应变分布情况及节点核心区的受力情况进行了试验研究和理论分析；(2)比较了不同螺栓规格和不同连接板厚度的节点试件的承载力和抗震性能，研究了高强螺栓规格和连接板厚度这2个因素对节点工作性能的影响；(3)介绍了光纤光栅传感技术在土木工程领域中的应用研究现状及其基本原理；并通过对比试验，探讨了光纤光栅传感器用于土木工程检测的可行性及实现途径。

Training in behaviour and social sciences at the undergraduate level is grossly inadequate, and is currently in a state of 'trial and error' and experimentation, in South East Asian countries.

在东南亚国家，大学阶段的行为和社会科学训练是很不恰当的，目前仍处在&反复试验&的状态中。

When doing the Dix-Hallpike on a flat table, it is often helpful to place a flat "boat" cushion under the persons back, to obtain head extension. One of these is illustrated below (in the mat-table illustration) If the person has arthritis in their neck, the maneuver may be performed in side-lying position.

Dix－Hallpike测试：患者坐于检查台上，在检查者帮助下迅速取仰卧悬头位，并向一侧偏45度，PC-BPPV者，头转向患侧时经数秒潜伏期后出现短暂眩晕和垂直旋转性眼震，反复试验有疲劳性。

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。