化学专业英语翻译2

02. THE NONMETAL ELEMENTS

We noted earlier. that -nonmetals exhibit properties that are greatly different from those of the metals. As a rule, the nonmetals are poor conductors of electricity (graphitic carbon is an exception) and heat; they are brittle, are often intensely colored, and show an unusually wide range of melting and boiling points. Their molecular structures, usually involving ordinary covalent bonds, vary from the simple diatomic molecules of H2, Cl2, I2, and N2 to the giant molecules of diamond, silicon and boron.我们前面提到的。-非金属表现出的性质有很大的不同，这些金属。作为一项规则，非金属都是热的不良导体电（石墨碳是个例外）和热；他们是脆的，往往是强烈的色彩，并显示一个非常广泛的熔点和沸点。其分子结构，通常涉及一般共价键，从简单的双原子分子氢，氯，碘，和氮气的大分子的金刚石，硅和硼。

The nonmetals that are gases at room temperature are the low-molecular weight diatomic molecules and the noble gases that exert very small intermolecular forces. As the molecular weight increases, we encounter a liquid (Br2) and a solid (I2) whose vapor pressures also indicate small intermolecular forces. Certain properties of a few nonmetals are listed in Table 2

非金属，在室温下是气体的分子量和双原子分子的惰性气体，施加很小的分子间力。随着分子量增大，我们遇到一个液体（溴）和固体（碘）

的蒸气压力也表明小分子间力。某些性能的几个非列于表2 Simple diatomic molecules are not formed by the heavier members of Groups V and VI at ordinary conditions. This is in direct contrast to the first members of these groups, N2 and O2. The difference arises because of the lower stability of π bonds formed from p orbitals of the third and higher main energy levels as opposed to the second main energy level2. The larger atomic radii and more dense electron clouds of elements of the third period and higher do not allow good parallel overlap of p orbitals necessary for a strong πbond. This is a general phenomenon — strong π bonds are formed only between elements of the second period. Thus, elemental nitrogen and oxygen form stable molecules with both σand πbonds, but other members of their groups form more stable structures based on σbonds only at ordinary conditions. Note3that Group VII elements form diatomic molecules, but πbonds are not required for saturation of valence.

简单的双原子分子没有形成较重的群体成员的第五和第六在普通条件。这是在直接对比的第一个成员的这些群体，氮气和氧气。差异是因为较低的稳定的π债券形成轨道的第三个及以上的主要能量水平相对于第二主要能源。较大的原子半径和更密集的电子云的第三周期元素和较高的不允许平行重叠的轨道需要一个强大的π债券。这是一个普遍现象的π债券形成的唯一的元素之间的二期。因此，氮元素和氧形成稳定的分子与σ和π债券，但其他成员的团体形成更稳

定的结构的基础上σ债券只在普通条件。注3，第七族元素形成双原子分子，但π债券不需要饱和价。

Sulfur exhibits allotropic forms. Solid sulfur exists in two crystalline forms and in an amorphous form. Rhombic sulfur is obtained by crystallization from a suitable solution, such as CS2, and it melts at 112°C. Monoclinic sulfur is formed by cooling melted sulfur and it melts at 119°C. Both forms of crystalline sulfur melt into S-gamma, which is composed of S8molecules. The S8molecules are puckered rings and survive heating to about 160°C. Above 160°C, the S8 rings break open, and some of these fragments combine with each other to form a highly viscous mixture of irregularly shaped coils. At a range of higher temperatures the liquid sulfur becomes so viscous that it will not pour from its container. The color also changes from straw yellow at sulfur's melting point to a deep reddish-brown as it becomes more viscous.

硫展品同素异形体。固硫存在2晶体形式和非晶态形式。正交硫是通过结晶从一个合适的解决方案，如二硫化碳，它融化在112摄氏°单斜硫是由冷却熔化的硫和它融化在119°C两种形式的结晶硫磺熔化成s-gamma，由8分子。级分子折叠环和生存加热至约160°C .160以上°，级环打开，其中一些片段相互结合，形成高粘度混合物的不规则形线圈。在一系列的温度较高的液体硫成为粘性，它不会从容器。颜色的变化也从稻草黄色硫的熔点为深褐色因为它变得更加粘稠。

As4the boiling point of 444 °C is approached, the large-coiled

molecules of sulfur are partially degraded and the liquid sulfur decreases in viscosity. If the hot liquid sulfur is quenched by pouring it into cold water, the amorphous form of sulfur is produced. The structure of amorphous sulfur consists of large-coiled helices with eight sulfur atoms to each turn of the helix; the overall nature of amorphous sulfur is described as3 rubbery because it stretches much like ordinary rubber. In a few hours the amorphous sulfur reverts to small rhombic crystals and its rubbery property disappears.

4沸点444℃°接近，large-coiled分子的硫部分退化和液体的粘度降低。如果把热的液体硫到入冷水中淬火，产生无定形硫。无定形硫的结构由八个硫原子的large-coiled螺旋与螺旋的每一圈；整体性描述一个无定形硫橡胶因为它像普通橡胶。在几个小时无定形硫还原为小菱形晶体和它的弹性也会消失。

Sulfur, an important raw material in industrial chemistry, occurs as the free element, as SO2 in volcanic regions, as H2S in mineral waters, and in a variety of sulfide ores such as iron pyrite FeS2, zinc blende ZnS, galena PbS and such, and in common formations of gypsum CaSO4? 2H2O, anhydrite CaSO4, and barytes BaSO4? 2H2O. Sulfur, in one form or another, is used in large quantities for making sulfuric acid, fertilizers, insecticides, and paper.

硫，一个重要的原材料工业化学，是自由的元素，如二氧化硫在火山地区，如硫化氢矿泉水，并在各种硫化矿如铁黄铁矿，闪锌矿，

方铅矿等，并在共同形成石膏CaSO 4?2 H2O，硬石膏CaSO 4，和重晶石BaSO?2 H2O。硫，一种或另一种形式，被大量用于制造硫酸，化肥，杀虫剂，和纸。

Sulfur in the form of SO2 obtained in the roasting of sulfide ores is recovered and converted to sulfuric acid, although in previous years much of this SO2was discarded through exceptionally tall smokestacks. Fortunately, it is now economically favorable to recover these gases, thus greatly reducing this type of atmospheric pollution. A typical roasting reaction involves the change:

硫的形式，二氧化硫在焙烧硫化矿回收和转化为硫酸，虽然以前这种二氧化硫被丢弃通过高大的烟囱。幸运的是，现在是经济上有利的回收这些气体，从而大大减少这种类型的大气污染。一个典型的焙烧反应涉及改变：

Phosphorus, below 800℃consists of tetratomic molecules, P4. Its molecular structure provides for a covalence of three, as may be expected from the three unpaired p electrons in its atomic structure, and each atom is attached to three others6. Instead of a strictly orthogonal orientation, with the three bonds 90° to each other, the bond angles are only 60°. This supposedly strained structure is stabilized by the mutual interaction of the four atoms (each atom is bonded to the other three), but it is chemically the most active form of phosphorus. This form of phosphorus, the white modification, is spontaneously combustible in air. When heated to 260°C it

changes to red phosphorus, whose structure is obscure. Red phosphorus is stable in air but, like all forms of phosphorus, it should be handled carefully because of its tendency to migrate to the bones when ingested, resulting in serious physiological damage.

磷，低于800℃由四原子分子，P。其分子结构提供了一个共价键的三，可预期从三个未配对的电子的原子结构，每个原子连接到三others6。而不是一个严格正交的方向，与三个债券90°对方，债券的角度只有60°。这种紧张的结构是稳定的相互交流的四个原子（每个原子保税其他三），但它是最活跃的形式磷化学。这种形式的磷，白色的修改，是在空气中自燃。当加热到260摄氏°它变红，磷，其结构是模糊的。红色磷在空气中稳定，如各种形式的磷，它应该谨慎处理，因为它的趋势，迁移到骨头，当摄入，造成严重的生理损害。Elemental carbon exists in one of two crystalline structures — diamond and graphite. The diamond structure, based on tetrahedral bonding of hybridized sp3orbitals, is encountered among Group IV elements. We may expect that as the bond length increases, the hardness of the diamond-type crystal decreases. Although the tetrahedral structure persists among the elements in this group — carbon, silicon, germanium, and gray tin — the interatomic distances increase from 1.54 A for carbon to 2.80 A for gray tin. Consequently .the bond strengths among the four elements range from very strong to quite weak. In fact, gray tin is so soft that it exists in the form of microcrystals or merely as a powder. Typical of the Group IV

diamond-type crystalline elements, it is a nonconductor and shows other nonmetallic properties7.

碳元素存在于一个2-金刚石和石墨的晶体结构。金刚石结构，基于四面体键杂化轨道中遇到的改变，Ⅳ族元素。我们可以预期，随着债券长度的增加，硬度的菱形晶体减少。虽然四面体结构之间存在的元素在这一组碳，硅，锗，锡和灰色的原子间的距离从1.54增加一个碳2.80的灰锡。因此。债券的优势四个元素之间的范围从非常强，很弱。事实上，灰锡很软，它存在的形式，微晶或仅仅作为一种粉。典型的四组菱形晶体元件，它是一个非导体和其他非金属properties7显示。

各专业的英文翻译

中国教育在线考研频道提供考研全方面信息指导及咨询服务，为您成功考研提供一切帮助。 哲学Philosophy 马克思主义哲学Philosophy of Marxism 中国哲学Chinese Philosophy 外国哲学Foreign Philosophies 逻辑学Logic 伦理学Ethics 美学Aesthetics 宗教学Science of Religion 科学技术哲学Philosophy of Science and Technology 经济学Economics 理论经济学Theoretical Economics 政治经济学Political Economy 经济思想史History of Economic Thought 经济史History of Economic 西方经济学Western Economics 世界经济World Economics 人口、资源与环境经济学Population, Resources and Environmental Economics 应用经济学Applied Economics 国民经济学National Economics 区域经济学Regional Economics 财政学（含税收学）Public Finance (including Taxation) 金融学（含保险学）Finance (including Insurance) 产业经济学Industrial Economics 国际贸易学International Trade 劳动经济学Labor Economics 统计学Statistics 数量经济学Quantitative Economics 中文学科、专业名称英文学科、专业名称 国防经济学National Defense Economics 法学Law 法学Science of Law 法学理论Jurisprudence 法律史Legal History 宪法学与行政法学Constitutional Law and Administrative Law 刑法学Criminal Jurisprudence

化学专业英语(修订版)翻译

01 THE ELEMENTS AND THE PERIODIC TABLE 01 元素和元素周期表 The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The number of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom is determined very nearly by the total number of protons and neutrons in its nucleus. This total is called the mass number, A. The number of neutrons in an atom, the neutron number, is given by the quantity A-Z. 质子的数量在一个原子的核被称为原子序数,或质子数、周淑金、电子的数量在一个电中性原子也等于原子序数松山机场的总质量的原子做出很近的总数的质子和中子在它的核心。这个总数被称为大量胡逸舟、中子的数量在一个原子,中子数,给出了a - z的数量。 The term element refers to, a pure substance with atoms all of a single kind. T o the chemist the "kind" of atom is specified by its atomic number, since this is the property that determines its chemical behavior. At present all the atoms from Z = 1 to Z = 107 are known; there are 107 chemical elements. Each chemical element has been given a name and a distinctive symbol. For most elements the symbol is simply the abbreviated form of the English name consisting of one or two letters, for example: 这个术语是指元素,一个纯物质与原子组成一个单一的善良。在药房“客气”原子的原子数来确定它,因为它的性质是决定其化学行为。目前所有原子和Z = 1 a到Z = 107是知道的;有107种化学元素。每一种化学元素起了一个名字和独特的象征。对于大多数元素都仅仅是一个象征的英文名称缩写形式,一个或两个字母组成,例如: oxygen==O nitrogen == N neon==Ne magnesium == Mg

英语原文及其翻译

Exploring Filipino School Counselors’ Beliefs about Learning Allan B. I. Bernardo [Abstract] School reform efforts that focus on student learning require school counselors to take on important new roles as advocates of student learning and achievement.But how do school counselors understand the process of learning? In this study, we explore the learning beliefs of 115 Filipino school counselors who indicated their degree of agreementwith 42 statements about the process of learning and the factors thatinfluence this process.A principal components analysis of the responses to the 42 statements suggested three factors:(F1)social-cognitive constructivist beliefs, (F2) teacher-curriculum-centered behaviorist beliefs,and (F3) individual difference factors.The preliminary results are briefly discussed in terms of issues related to how Filipino school counselors’ conceptions of learning may guide their strategies for promoting student learning and achievement. [Key words]beliefs about learning, conceptions of learning, school counselors, student learning, Philippines School reform efforts in different parts of the world have focusedon students’learning. In particular,most school improvement programsnow aim to ensure that students acquire the high-level knowledge and skills that help them to thrive in today’s highly competitive globaleconomy (e.g., Lee & Williams, 2006). I n this regard, school reform programs draw from various contemporary theories and research on learning (e.g.,Bransford,Brown, & Cocking, 1999; Lambert & McCombs, 1998).The basic idea is that all school improvement efforts should be directed at ensuring students achieve high levels of learning or attainment of well-defined curricular objectives and standards.For example, textbooks (Chien & Young, 2007), computers and educational technology (Gravoso, 2002; Haertnel & Means, 2003;Technology in Schools Task Force, 2003), and educational assessment systems (Black & Wiliam2004; Cheung & Ng, 2007; Clark, 2001; Stiggins, 2005) are being reconsidered as regards how they can effectively provide scaffolds and resources for advancing student learning. Likewise,the allocation and management of a school’s financial resources are assessed in terms ofwhether these are effectively mobilized and utilized towards improving student learning (Bolam, 2006; Chung & Hung, 2006; Retna, 2007). In this regard, some advocates have also called for an examination of the role of school counselors in these reform efforts (Herr, 2002). Inthe United States, House and Hayes (2002) challenged school counselors to take proactive leadership roles in advocating for the success of all

选矿专业英语

1 总论 采矿mining 地下采矿underground mining 露天采矿open cut mining, open pit mining, surface mining 采矿工程mining engineering 选矿（学）mineral dressing, ore beneficiation, mineral processing 矿物工程mineral engineering 冶金（学）metallurgy 过程冶金（学）process metallurgy 提取冶金（学）extractive metallurgy 化学冶金（学）chemical metallurgy 物理冶金（学）physical metallurgy 金属学Metallkunde 冶金过程物理化学physical chemistry of process metallurgy 冶金反应工程学metallurgical reaction engineering 冶金工程metallurgical engineering 钢铁冶金（学）ferrous metallurgy, metallurgy of iron and steel 有色冶金(学)nonferrous metallurgy 真空冶金(学)vacuum metallurgy 等离子冶金(学)plasma metallurgy 微生物冶金(学)microbial metallurgy 喷射冶金(学)injection metallurgy 钢包冶金(学)ladle metallurgy 二次冶金(学)secondary metallurgy 机械冶金(学)mechanical metallurgy 焊接冶金(学)welding metallurgy 粉末冶金(学)powder metallurgy 铸造学foundry 火法冶金(学)pyrometallurgy 湿法冶金(学)hydrometallurgy 电冶金(学)electrometallurgy 氯冶金(学)chlorine metallurgy 矿物资源综合利用engineering of comprehensive utilization of mineral resources 中国金属学会The Chinese Society for Metals 中国有色金属学会The Nonferrous Metals Society of China 2 采矿 采矿工艺mining technology 有用矿物valuable mineral 冶金矿产原料metallurgical mineral raw materials 矿床mineral deposit 特殊采矿specialized mining 海洋采矿oceanic mining, marine mining 矿田mine field

化学专业英语翻译1

01.THE ELEMENTS AND THE PERIODIC TABLE 01元素和元素周期 表。 The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The number of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom is determined very nearly by the total number of protons and neutrons in its nucleus. This total is called the mass number, A. The number of neutrons in an atom, the neutron number, is given by the quantity A-Z. 原子核中的质子数的原子称为原子序数，或质子数，卓电子数的电中性的原子也等于原子序数Z，总质量的原子是非常接近的总数量的质子和中子在原子核。这被称为质量数，这个数的原子中的中子，中子数，给出了所有的数量 The term element refers to, a pure substance with atoms all of a single kind. To the chemist the "kind" of atom is specified by its atomic number, since this is the property that determines its chemical behavior. At present all the atoms from Z = 1 to Z = 107 are known; there are 107 chemical elements. Each chemical element has been given a name and a distinctive symbol. For most elements the symbol is simply the abbreviated form of

英文翻译(原文)

GRA VITY RETAINING?WALL 1. INTRODUCTION Retaining walls are structures used to provide stability for earth or other material where conditions disallow the mass to assume its natural slope, and are commonly used to hold back or support soilbanks,coal or ore piles, and water. Retaining walls are classified, based on the method of achieving stability, into six principal types (Fig.1). The gravity-wall depends upon its weight, as the name implies, for stability. The cantilever wall is a reinforced-concrete wall that utilizes cantilever action to retain the mass behind the wall from assuming a natural slope. Stability of this wall is partially achieved from the weight of soil on the heel portion of the base slab. A counterfort retaining wall is similar to a cantilever retaining wall, except that it is used where the cantilever is long or for very high pressures behind wall and has counterforts, which tie the wall and base together, built at intervals along the wall to reduce the bending moments and sheers. As indicated in Fig.1c, the counterfort is behind the wall and subjected to tensile forces. A buttressed retaining wall is similar to a counterfort wall, except that the bracing is in front of the wall and is in compression instead of tension. Two other types of walls not considered further are crib walls, which are built-up members of pieces of precast concrete, metal, or timber and are supported by anchor pieces embedded in the soil for stability, and semigravity walls, which are walls intermediate between a true gravity and a cantilever wall. (a)(b)(e)

英语原文及翻译

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《化学工程与工艺专业英语》课文翻译 完整版

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