主要成分

Analysis of variance and principal component analysis were used to analyzed the data. Results: three hundreds and one women (30.28%) met AX criteria for PMS. There was statistic difference between the normal and the PMS cases. The pattern of symptoms were differ in different age-groups, Principal component analysis of TCM syndrome show that this questionnaire include most of the PMS symptoms. Health status and denutrition were the main cause for PMS.

结果：301名受试者(30.28%)满足PMS诊断要求，正常人群与PMS患者的症状水平差异显著，PMS患者不同年龄组部分症状水平差异显著，主成分分析显示本筛选表涵盖了PMS发病的主要症状；健康程度、营养程度低的女性易发病；部分PMS患者伴有痛经。

There are deoxidize, plasma, microwave, microorganism and electro-chemistry technology.

主要介绍了近年来国内外在治理废气中有害成分NOx及SOx的方法，其中包括还原法、等离子技术、微波技术、微生物法、电化学法等。

During depuration, the survival rate reached 100%, and the main nutritional components of Crassostrea Rivularis showed no significant change.

在净化过程中牡蛎的存活率达到100%，主要营养成分无显著变化。

Hydroquinone is one of the key ingredients in Obagi Nu Derm and is a very strong ingredient which can cause adverse affects if not used correctly. With the Obagi system you are unlikely to see these affects but you can never be sure. This is a negative for the Obagi Nu-Derm system and may put a lot of people off using the system.

对苯二酚是欧邦琦 Nu-Derm 系统关键成分之一，如果使用不当，也是导致副反应的主要因素，您未必能见到欧邦琦的这些副反应，但您永远不要确定，对欧邦琦来说这是消极的，可能会使一些人中途放弃。

The characteristics of sulfuric acid dew point environment are briefly introduced, and the mechanism of effect...

介绍了硫酸露点腐蚀环境的特点并讨论了合金元素对该低合金钢耐硫酸露点腐蚀的作用机制和国内外现有主要低合金耐硫酸露点钢的化学成分、力学性能和耐蚀性能。

Cornea is a component of the ocular dipotric system, it is the main reflecting interface of the eye, its high diaphaneity is the basis for good visual acuity and inhibiting light from scattering.

作为眼球的屈光系统成分之一，角膜是眼的主要反射界面。角膜的高透明度是抑制光线散射、保持健康视力的重要基础。

The second part focuses on inspecting the similarities and differences of the symonymly monosyllable and disyllable nouns in syntax from the perspectives of lexical category, collocation and syntactic elements.

第二部分主要从词性、搭配以及充当句法成分的情况等方面，在近义单、双音节名词词义基本相同的情况下，考察它们在句法上的不同。

The cultural diversity is the most important factor that enhances market orientation. 2. Among four cultural components, the clan and the market both have a significant negative effect on market orientation.

网路 状态之四个主要构面︰角色共识和信任、向心力、依赖性和角色整合，则只有角色共识和信任对市场导向有正向作用，同时，角色共识和信任和企业文化成分间的交叉效果亦不显著。

Based on the revision suggestions of Technical Specification for Heat-Insulation and Wear-Resistant Lining SH3531-1999, main amendments in new edition Technical Specification for Heat-Insulation and Wear-Resistant Lining SH3531-2003 are expounded as follows:(1) The negation of double layer lining without testudinate net and further affirmation of single layer lining.

针对《隔热耐磨混凝土衬里技术规范》SH3531-1999版提出的修改意见，介绍了新版衬里规范SH3531-2003设计部分的主要修改之处：对无龟甲网双层衬里的否定及单层衬里的进一步肯定，衬里插入管、锚固件等有关结构的改进，厚度计算公式的修改及衬里材料化学成分的要求等。

Research direction of this department is concerned on: 1 Chinese medicine identification and finding, Development and utilization of new resource,2Research on use part of Chinese medicine and druggery preparation,3Research on quality degree of Chinese medicine.

主要从事中药鉴定及新资源的寻找、开发和利用、中药及其制剂有效成分的研究、中药新制剂及质量标准研究等。

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。