Direct result of what can be finished. Su Song, "beg to surrender Dudie revisions state imperial guards barracks-like": "side of home market and buy materials, firing brick." Song Li Gang "Syria built on the total Chi Yan trapped above the": "is still building the dump, holding Britain distress, to 11 repairs, and materials rarely, in particular, this so difficult to have. "such as: less than a decade of effort, we planted trees all the mountains into the material friends.
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No. 10
Providing content of a work thing. Yuan Zhang a long time, "celebrate the East of the original plays Ma Zhiyuan ancestors Dance" song: "Rong, thin, Konoha carving. On the West Window is full of poetic material." Lu Xun "且介亭杂文" eye for an eye "": "Those 'friends We '... ... will know that "Caesar Biography" of the material is Buluteqi's "Heroes," where access to the. "Lao She," How do I write <Rickshaw> ":" I like to gather into a fan materials, to the life and appearance transform Xiangzi on countless occasions. "
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No. 11
That the information for reference. Mao Zedong, "" Agrarian Investigation> Preamble and Postscript ":" The following material is to help comrades to find a research problem. "Such as: learning materials.
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No. 12
Metaphor suitable to do some things personnel. Yuan Qin fu, "East Hall and old" First off: "That you were throwing fireworks and other post-cured materials, fast shipping salt to prepare the 5000 guidelines, thousands of worried pick tea." Qing Li Yu, "flounder and modified with": "I think he throat posture, it touches on so raw materials. "like Yao," Rereading, "Chapter II:" Please do not send me to South lord. radish dig treasures, I am not the right material. "
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No. 13
① made directly to the finished object: the bike is very light, is what the material? ② for study, research, writing, use of information: Reference Materials | Statistics material. ③ analogy right people: He is an actor's material.
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No. 14
Materials English name: makings Materials cáiliào [Material]: raw materials; for something finished products Materials Science Mechanics of Materials [Data; material]: data; for reference or as a material thing Reference Materials Archives [Makings; stuff]: qualified candidate for something He is not acting in the material Materials used in the manufacture of human goods, devices, components, machinery or other products to those substances. Material is material, but not all to be called the material. Such as fuel and chemical raw materials, industrial chemicals, food and drugs, are generally not considered material. But this definition is not so strict, such as explosives, solid rocket propellant, commonly known as "energetic materials", because it is an integral part of the artillery or rockets. Material is human survival and development of physical infrastructure. 70 20th century, the people the information, materials and energy hailed as the three pillars of modern civilization. 80 high-tech group represented by the new technological revolution, again new materials, information technology and biotechnology listed as an important symbol of the new technological revolution. This is mainly because the material and the national economic construction, national defense and people's lives are closely related. In addition to the importance and universality of the material, it also has diversity. As varied, there is no a unified classification standard. Points from the physical and chemical properties, can be divided into metal materials, inorganic non-metallic materials, organic polymer materials and different types of materials composed of composite materials. Come from the use of points, is divided into electronic materials, aerospace materials, nuclear materials, building materials, energy materials, biological materials. Two more common classifications are structural materials and functional materials; traditional materials and new materials. Mechanical properties of structural materials is based, in order to create the force components of the materials used, of course, the structure of the physical or chemical properties of materials, there are certain requirements, such as gloss, thermal conductivity, radiation, anti-corrosion, anti-oxidation. Functional materials is the use of substances are mainly unique physical and chemical properties or biological functions and the formation of a class of materials. Structural materials of a material is often only functional materials, such as iron, copper and aluminum. Traditional materials are those that have been mature and mass production in industry and the large number of applications of materials such as steel, cement and plastics. Because of its large quantity of such materials, the output value of high, wide-ranging, but also the basis for many of the pillar industries, it is also known as the base material. New materials (advanced materials) are those that are being developed, and has excellent performance and prospects of a class of materials. New materials and traditional materials, and no clear boundaries between the traditional materials through the use of new technologies, improve the technical content, improved performance, a substantial increase in value and become a new material; new material in over a long period after the production and application has become the traditional material. Traditional materials is the development of new materials and high-tech base, and new materials often can promote the further development of traditional materials. Plastics Materials _Select_ion in the process of formulation Problems ---------------------------------------- -------------------------------------------------- -------- Generally should be considered in the choice of the following: the choice of materials to the environment in the use of the highest and lowest temperature range can withstand, in this temperature range, whether the deformation of material, not prone to cracking, impact resistance of such a . Do not meet user requirements, we must change the existing plastic variety, and the other to _select_ a new species, or modification. In addition, the materials to be designed with the environment in other factors also need consideration. Dimensionally stable products in the required performance, they must also take into account the coefficient of thermal expansion resin, to consider the thermal expansion coefficient of resin, molding and forming the initial shrinkage of the late changes, moisture and other factors. Under normal circumstances, can not satisfy all the conditions, as long as the main conditions on it. Control on quality standards, generally according to the following conditions. (1) able to cope with excess degree of use of the environment changes, the impact of the sun and the use of load changes. (2) products is in compliance with health standards and safety. (3) bending strength, tensile strength, impact strength, electrical insulation, arc resistance, fire resistance, water resistance, oil resistance, electrical performance is in line with national standards, solvent resistance and other mechanical properties, business standards. (4) dimensional stability, optical properties, anti-drug and anti-bacterial properties of how wet. (5) appearance and economic costs, whether the special requirements to meet the requirements. For the long-term use of plastic materials and products, repair and maintenance costs must be considered, if it can greatly reduce maintenance costs, even if the initial investment is large, but the material as a whole or beneficial. Also consider the processing behavior and the ease of secondary processing, consideration of material changes in the mold. In the design of bearings, gears and other important parts, but also the physical and mechanical performance test should be analyzed; do transparent materials, optical test and should be amended.
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English Expression
: datum
n.: stuff, material, matter, stock, substance, assemble evidence/material, supplementary reading, data, makings, substance or things from which sth else is or can be made
cutting