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More complicated perspective projections can be composed by combining this one with rotations, scales, translations, and shears to move the image plane and center of projection wherever they are desired.

更加复杂的透视投影可以是与旋转、缩放、平移、切变等组合在一起对图像进行变换。

U.S. National Institutes of Health, Disease Prevention and Control Center, composed of special scientific group to study the condoms for AIDS, gonorrhea, chlamydia, syphilis and chancroid, lymphogranuloma sexually transmitted diseases, such as genital herpes and condyloma 9 Sexually transmitted diseases to protect the effectiveness of the current found that the widespread use of condoms can not be completely effective to prevent any spread of sexually transmitted diseases!

美国国立卫生研究院、疾病预防和控制中心组成的科学特别小组，研究了避孕套对艾滋病、淋病、衣原体、梅毒、软下疳、性病淋巴肉芽肿、生殖器疱疹和尖锐湿疣等9种性传播疾病的保护效果，发现目前广泛使用的避孕套不能彻底有效的防止任何一种性病传播！究其原因，避孕套不安全主要有三点

The system is composed of two physical parts: one is Browser Side Broker , another is Server Side Agent , so the system need not change the settings of Web server or browser, and is easy to be deployed.

该系统分为浏览器端代理和服务器端智能代理两个物理部分，从而无须改动Web服务器或者浏览器的设置，便于系统部署。

Methane chloridate , general name of monochloro methane , dichloro methane , trifluoro methane and tetra chloromethane mainly composed of natural gas and liquefied chlorine gas , can not only be used as solvent , degreasant , decolourant , aerosol , freezing medium and detoxicator , etc .but also the raw material for the production of medicine , pesticide , organic ailicon and organ fluorine , etc.

甲烷氯化物是包括一氯甲烷、二氯甲烷、三氯甲烷、四氯化碳四种产品的总称。甲烷氯化物除可作为溶剂、脱脂剂、漂白剂、氯雾剂、制冷剂、灭火剂、麻醉剂等以外，还是生产医药、农药、有机硅和有机氟系列产品等原料。

The Automotive Finishes was composed of Cardura E 10-based acrylic resin with high-solids and excellent weather resistance as main resin, and Cardura E10-based polyester resin with high-solids as additional resin to be used to improve decorative properties, such as chubbiness, gloss, PGD,and so on, of the only acrylic amido automotive finishes.

该面漆以叔碳酸缩水甘油酯(商品名E10)改性高固体份丙烯酸树脂作为主体树脂，该树脂是具有高耐候性的丙烯酸树脂，以叔碳酸缩水甘油酯改性高固体份聚酯树脂作为添加树脂，弥补单纯丙烯酸氨基漆在丰满度、光泽、鲜映性等外观装饰性等方面的不足，从而形成高耐候性、高装饰性的高品质、高固体份汽车面漆。

YZT rubber vibration absorber(for electronic apparatus and instruments) is composed of steel plate with bolt on top and bottom,columniform and coniform rubber in the middle,which can be compressed and stretched.

YZT型橡胶隔振器是由配螺栓的上下钢板、中间圆柱形、圆锥形橡胶体承载，可压缩和伸长，具有结构简单、安装方便，耐酸碱、耐油、抗老化、耐温等性能，广泛应用于电子仪器、仪表、设备柜内，也可应用在风机、水泵、冷水机组和柴油机组等。

Its basic structure, which called as 2×2 optical cross connecter, is composed of a fiber Bragg grating and a bidirectional OC. Based on the basic structure, the required N×N OXC can be designed.

其基本结构由一个双向环行器与一个光纤布拉格光栅组成，构成一个2×2光交叉连接器，再根据这一基本结构设计出可满足实际需要的N×N光交叉连接器。

The bioinformatics analysis showed that the gene had the highest homology with the gene of Penicillium janthinellum, which reached up to 76%. The first 26 amino acids might be a signal peptide sequence with the hydrophobicity of up to 2.63. The CBHⅠ gene consisted of the catalytic domain, convergence zone and cellulose-binding domain and its tertiary structure was mainly composed of 3-sheets.

分别扩增到鹅源草酸青霉F67纤维素酶CBHⅠ基因片段A(EU574736)、5'端序列B1(EU603295)、3'端序列B2(EU652768)及全长基因C(EU727171)，并成功构建真核表达载体pPIC9K-CBHⅠ；生物信息学分析表明，该基因蛋白序列与微紫青霉氨基酸序列同源性最高，达76%，前26个氨基酸为信号肽序列，疏水性可达2.63，由催化功能域、衔接区和真菌性纤维素结合域构成，其三级结构主要为β-sheet。

For an uncertain system described by convex combination of interval polynomials, its Hurwitz-stability can be guaranteed by certain subset composed of vertices and edges.

对于由区间多项式的凸组合描述的不确定系统，它的Hurwitz稳定性可由某个仅由顶点和棱边构成的子集来保证，且此集合的大小与系统的维数无

With the continuous development of computer science and technology, the application systems in the future will be multilayer ones based on the object oriented, distributed, isomerous conditions. This kind of system is composed of distributed objects one by one, which have given functions singly. These objects are independent of network protocols, programming languages, and software and hardware platforms. These pro- perties make them communicate each other and work corporately.

随着计算机科学技术的不断发展，未来的应用系统将主要是建立在面向对象的、分布的、异构的、自治的环境中的多层应用系统，系统主要由一个个分布式对象组成，对象各自具有特定的功能，可以跨越平台，独立于网络协议、编程语言和软硬件平台，实现相互通信，协同工作。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。