主要

Thermal exposured at 175 ℃ for 100 h and 500 h, the yield strength decreases by 5.5% and 14%, and the elongation decreases by 4% and 9.3%, respectively. The fact that S′(Al2CuMg) precipitates get coarsen and the precipitate-free-zones get wider are responsible for the decline of the tensile properties of 2124-T851 aluminum alloy under thermal exposure condition.

于175 ℃热暴露500 h屈服强度和伸长率就分别降低14%和9%；于热暴露条件下，2124-T851合金拉伸性能衰退的主要原因是合金固溶体基体内主要强化相S′(Al2CuMg)相粗化以及晶界无沉淀析出带的宽化。

Thermal exposured at 175℃ for 100 h and 500 h, the yield strength decreases by 5.5% and 14%, and the elongation decreases by 4% and 9.3%, respectively. The fact that S'(AI2CuMg) precipitates get coarsen and the precipitate-free-zones get wider are responsible for the decline of the tensile properties of 2124-T851 aluminum alloy under thermal exposure condition.

于175℃热暴露500h屈服强度和伸长率就分别降低14%和9%；于热暴露条件下，2124-T851合金拉伸性能衰退的主要原因是合金固溶体基体内主要强化相S'(Al2CuMg)相粗化以及晶界无沉淀析出带的宽化。

The principal animal oils are cod-liver oil and oil found in the yolk of egg; principal vegetable oils are olive, cottonseed, poppy, and cocoanut oils, peanut oil, and oils in various nuts.

主要动物油脂是：鱼肝油、蛋黄油。主要植物油脂有：橄榄油、棉籽油罂粟油、可可油、花生油及各种干果油。

Its main task is to make students understand clearly and wholly the basic theory, analysis result and the latest development of information theorem and coding by teaching and exercises, which can build a substantial theory basis for studying the subsequent courses on the transmission, storage and processing of information, image and speech source compression and coding, and error-correcting coding for computer communication and wireless mobile communication, as well as the research and development of modern code theory.

它的主要任务是通过教学和习题，使学生对信息与编码的基本理论，主要分析结果以及最新的发展有一个清晰和完整的认识和理解。为学习和研究信息的传输，存储和处理相关类的后续课程，以及图像与语音信源压缩编码、计算机网络通信与无线移动通信纠错编码、以及各种现代密码理论与技术的研究和开发，打下坚实的理论基础。

My main production TSF Academy Soft Machine Tool belt and matching adhesive used primarily for machine tool guideways, abrasion resistance, static and dynamic friction coefficient of the difference small, not crawling, positioning accuracy, and has enough anti-aging and physical properties of mechanical is to improve the machining precision, extended service life Guide the best choice, the products applicable to all types of machinery and equipment manufacturing friction vice and maintenance.

我院主要生产TSF机床导轨软带与配套使用的胶粘剂，主要用于机床导轨，抗磨损，静动磨擦系数差值小，不爬行，定位准确，并具有耐老化和足够的机械物理性能，是提高机床加工精度，，延长导轨副使用寿命的最好选择，本产品适用于各类机械设备磨擦副的制造与维修。

Chapter 2 makes a brief introduction of the same-sex marriage legislative mode of main counties and districts in the world from the substantive aspect, classifying them into four kinds: fragmentary control mode, cohabitant legislative mode, registered partnership legislative mode and same-sex marriage legislative mode.

第二章主要从实体法的角度对世界主要国家和地区的同性婚姻立法模式进行考察，介绍四类不同的立法模式：零星地规制模式、同居者立法模式、注册伴侣立法模式和同性婚姻立法模式。

And it was major -- a major factor in bringing about the end of the Cold War.

而那是一个主要的——一个使得冷战结束的主要的因素。

Hubei Jingsheng Trading CO., Ltd, established in 2001, specialize in all kinds of steel related products, mainly including resources like slab billet, square billet, coating steel, iron ore, steel scrap , and also finished products hot-roll steel plate/coil, cold-roll steel plate/coil, medium plate, medium thick plate, thick-width steel plate, I-beam and channel steel.

公司简介：湖北景盛贸易有限公司主要从事钢材系列产品的大宗贸易交易。公司主要经营：板坯、方坯、彩板、矿石、废钢等，同时以冷热轧板、中板、工槽钢等品种为辅。

This paper firstly studies the main causations for the evolvement of colleger's mentality including international thoughts, domestic environment, popular higher education and cyber-network.

本文从研究大学生思想发展变化的主要影响因素入手，就国际思潮复杂化、国内经济发展快速化、高等教育大众化、成长环境网络化等四个方面的发展变化，分析了影响当代大学生思想发展变化的主要原因。

During this period, the commercial capital played a major role in commercial capitalists become the main promoters of colonial expansion.

在这一时期，商业资本起了主要作用，商业资本家成为殖民扩张的主要推动者。

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。