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Mechanics and electrology both play dominant roles in the physics course in middle schools, but electrical concepts, more abstract than mechanical ones, are not only the difficulty of learning, but also the focus and difficulty of teaching.

物理概念是物理科学知识体系中最基本的部分，在中学物理课程中，力学和电学占据着主要地位，其中电学概念相对力学概念更抽象，是学生学习的难点，同时也是教师教学的重点和难点。

With the development of economy and the emancipation of women, women's social roles become more and more varied.

随着经济的发展以及妇女解放运动的开展，女性的社会角色越来越多样化。

The following discussion of embryological origins, morphological characteristics and possible roles of Malassez epithelial rest was presented in this review.

本文就Malassez上皮剩余的胚胎来源、组织结构特点及其可能的功能作一综述。

Similar roles of most of the expansin genes and XTH family genes were found in endocarp and/or pulp tissues of fruit, for their expression pattern are associated with the distribution of endoreduplication in different tissues of fruits.

CsExpl，4和XTH基因在分裂旺盛的果实发育前期表达较高，从而推测其在细胞分裂中的细胞壁修复和重建过程起重要作用。

The results suggested that the endosperm haustoria played roles in the absorption and transportation of nutrients to endosperm.

结果表明胚乳吸器起营养物质的吸收和转运作用，向胚乳提供养料。

Ten lesbian couples who have been together for more than a year were interviewed in the present study. The data explored three stages they went through while building their intimate relationships: awareness, initial contact, and relationship maintenance. The results highlighted the dynamic process of the development of lesbian couple relationship, and the uniqueness of such relationship (including its lack of clarity, its purity and enmeshment, and its flexibility regarding gender roles).

本文透过10对固定交往一年以上的女同志伴侣深入访谈资料，进一步从相识、相熟、到伴侣关系经营与维持三阶段，探讨女女之间亲密关系建立的可能性，彰显出女同志伴侣亲密关系发展的动态历程，及其伴侣关系经营的特殊性（包括：呈现若隐若现、纯粹而黏腻的伴侣关系、多元弹性的性别角色）。

Objective To investigate the roles of nitric oxide and eNOS in the pathogenesis of vasovagal syncope.

目的 探讨一氧化氮和内皮型一氧化氮合成酶与儿童血管迷走性晕厥发病的关系。

Chapter Ⅱ"Making-policy System and Policy Goal"discusses the changes of making-policy system and the roles of varied force groups played in the choosing process of policies when Japan decided to enter into alliance with either Britain or with Germany and Italy.

并在此基础上指出，尽管日本各个时期决策机制有所变化，决策层在手段选择中存在分歧，但在这种变化和分歧的背后，他们所追求的政策目标却始终是一致的。

Conditions,objects and targets as students' dynamic roles should form an organic entia in the process of activities,and teachers' teaching activities and students' learning activities deploy in this entia of activities.

因此，在教学活动中，就包含了教师作为教育主体的教学活动和学生作为学习主体的学习活动的两个方面。显然两者缺一不可，关键在于如何使两种活动达到统一或者说如何使两者能在统一中实现教学的目标？

In this paper,its important roles in entomology are summarized.

本文重点综述了其在昆虫学研究中的作用。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。