原因

Simultaneously, the total extractible myoglobin decreased and the proportion of metmyoglobin increased significantly when the pressure above 400MPa. Beef discoloration after pressure processing may result from oxidation of ferrous myoglobin to ferric metmyoglobin, globin denaturation and structural changes. At 40℃, the changes of beef color was similar to that of room temperature's. When the temperature rise to 60℃, most of muscle proteins denatured, a small quantity of native myoglobin could not affect the color of beef significantly. Therefore, protein denaturation was attributed to the main cause of discoloration in beef muscle after pressurization at 60℃.

压力处理导致色泽变化的直接原因可能是由于二价铁的肌红蛋白氧化成三价铁的高铁肌红蛋白、球蛋白的变性及结构的变化所致。40℃时的压力处理，色泽的变化规律与室温下相似，只是色泽变化的程度更为剧烈，蛋白质变性在色泽变化中起到的作用逐渐加强。60℃下的压力处理，绝大部分蛋白质发生变性，少量未变性的肌红蛋白对色泽不会产生明显的影响，此温度的压力处理，蛋白质变性是造成肌肉失去红色的主要原因。

Besides some evident factors, however the rising of idyll is dependent on two deep-seated reasons-the mode of life of scholar-bureaucrats under feudally political and economic system;the rapid development of metaphysics.

而它之所以恰在晋宋之际走向成熟，走向勃兴，除一些显而易见的原因如文学自身发展的结果、江南温润明秀风景的影响、和山水田园诗几乎同时出现的山水画论的促进作用等之外，有两个深层的原因非常值得重视。

Recent studies indicate land fiscalization is one of the important reasons for land decrease.

研究结果表明：①土地财政与耕地数量之间存在相互反馈作用；②土地财政是导致我国耕地数量减少的重要原因，其影响的弹性系数为-0.01；③土地财政对耕地保护具有正反两方面作用：一方面，土地财政刺激地方政府形成城市扩张冲动，导致耕地数量减少；另一方面，土地财政带来土地开发整理增加耕地面积的大幅增加，降低耕地减少速度；④经济、人口和城镇化等社会经济因素也是导致我国耕地数量减少的重要原因。

Based on questionnaire and interviewers, the paper makes a brief study on such speech acts as kinship, greeting, introduction, conversation and social interaction, etc. It draws an outline of the major factors that some of the Chinese maintain their tradition etiquettes while some of them foreignize their communication styles during the recent 30 years since 1979 under the western cultural infiltration.

通过调查问卷及访谈，总结外语学习者最常用的称谓、问候、介绍、交谈、礼交礼节等方面的言语交际行为，分析和勾勒改革开放三十年来，在西方文化的不断渗透和影响下，中国人保留礼貌传统的原因以及某些交际用语和行为举止西化的原因。

The reasons of shield tunnel segments floating are discussed first,including the buoyancy produced by water,grouts or slurry,the gap produced by shield shell,and the disturbance produced by excavation to overburden soil,etc.

基于大断面盾构隧道施工中经常碰到的上浮问题，首先讨论了盾构隧道施工中管片上浮的原因：水、注浆所用浆液、泥水盾构所用泥浆等所产生的浮力，以及建筑间隙的存在、施工过程对上覆土的扰动等，都可能是盾构管片上浮的原因。

First, the actuality of Jiangyin bridge's deck surfacing are reviewed. Improper materials and pavement structures, severe conditions, overload and heavy traffic are deemed to be the main factors which result to deterioration of the deck surfacing. Then, programme of local repair asphalt mixture design has been proposed. It is considered that epoxy asphalt mixture and guss asphalt mixture are propitious to the local repair. The epoxy asphalt is also chosen as the adhesive layer material. Next, two pavement structures for steel deck plate surfacing have been tested. The most suitable asphalt surfacing structures have been proposed for the local repair. Finally, the elaborate local repair schemes of Jiangyin bridge's deck surfacing are proposed.

论文首先调查评估了江阴桥桥面铺装的现状，分析了江阴桥桥面铺装破坏的原因，认为材料及结构选用不当、使用条件苛刻、超载与大交通等是主要原因；其次对修复铺装混合料进行了配合比设计，认为优化后的环氧沥青混合料与浇注式沥青混合料适合于江阴桥的铺装修复，而粘结材料则采用环氧沥青粘结剂；然后参考国内外已有的桥面铺装结构组合，对两种复合结构进行了比较研究，提出了适于江阴桥桥面铺装局部修复的铺装结构组合；最后在各项研究的基础上，提出了江阴桥桥面铺装局部修复的具体方案。

Objective To investigate the effect of Gynecological laparoscopies for chronic pelvic pain without clear causes in women.

目的 通过腹腔镜手术探讨不明原因的女性慢性盆腔疼痛的原因。

Decreasing bone formation may be the main reason for the reducing calcium content in the otoconia. The headward distribution of blood volume may account for the morphological changes in the middle ear and inner ear.

骨形成减少可能是引起耳石中钙含量减少的主要原因；而头部血流量的增多可能是中耳和内耳形态学改变的原因。

Results Fever, pneumonia with unknown causes, death with unknown causes, diseases similar the flu and numbers of patient in emergency department have been monitored in more than 80 percent of hospitals. However, the proportion of reported hematosepsis and infectious shock were 51.3% and 63.7%, respectively. Moreover, the surveillance rate of pathogen and toxicosis were lower and there was no earlywarning ability in public health emergency.

结果 80％以上医院对发热、不明原因肺炎、不明原因的死亡、流感样疾病和急诊入院人数实行了监测并能及时上报异常情况；对败血症/感染性休克监测和报告的比例分别仅为51.3％和63.7％；对病原生物和中毒的检测能力较低；对各类突发公共卫生事件没有预警能力。

Based on the detailed water quality monitoring data of about 317 hydrometric stations from 1960 to 2000 and water quantity data of 20 hydrometric stations between 1919 and 2000 included in the Hydrological Yearbooks, which were all published by Yellow River Conservancy Commission, and socio-economic data related to the Yellow River, the characteristics of water quantity, major ion chemistry, organic contamination and their mechanisms, and integrated watershed management issues of the Yellow River have been systematically studied in this work.

本文在全面分析黄河流域300余水文站过去40年（1960—2000）水质资料和干支流20余水文站过去近50年（1950—2000）径流量资料的基础上，研究了：（1）、黄河水量的基本特征和近40年来的变化，重点讨论了黄河下游&断流&现象的发展及原因：（2）、黄河天然水质的基本特征、区域分布和影响因素；（3）、黄河天然水质40年来的变化趋势及原因；（4）、黄河水系氮污染和有机污染的特征、近40年来的发展，及其与社会经济发展的关系；（5）、黄河下游水质变化与水量变化的关系；以及，（6）、黄河水质水量管理中的制度安排问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。