1、Abstract1 基本特性2 时态3 语态4 语法修辞5 一个典型示例6 化学常用句式,定义：以提供文献内容梗概为目的，不加评论和补充解释，简明、确切地记叙文献重要内容的短文。摘要是检索机构数据库的重要信息来源。,1 基本特性具有独立性和自明性，它是通篇文章的概括和总结，应该反映文章的全貌，因此一篇英文摘要应该用简明、精炼、确切的文字向广大读者提供尽可能多的定性和定量的信息。,简要陈述研究工作的宗旨与解决的问题，说明理论或实验方案，概述基本发现，并指出主要结论。切勿对结论做自我评价。综述的摘要应阐述评述的话题、范围和评述的资料来源以及结论。摘要应确系反映文章的内容。摘要应便于读者明了这篇文章
2、的性质与范围，有助于编者为存储和检索来确认文章的关键特征。,虽然摘要不是文章本身的替代物，但摘要必须简要、自明、足够完整，可以文摘刊物的形式独立存在。摘要通常不分段，长短依文章的主题而异。不同学会和刊物的要求不完全相同。摘要不要引证文献、图表，并不应包括方程式、图示或结构式。略号在摘要中首次使用时应给出定义（正文首次使用仍需再次定义）。,基本类型： 报道性，指示性，报道指示性和 结构式文摘 注意摘要与前言的区别，有关背景资料（background information) 放前言中,摘要有几种类型：informative abstractindicative abstractinformati
3、ve-indicative abstractstructured abstract 20世纪80年代出现的，是报道性摘要的结构化表达摘要的内容应大致包括 IMRAD: Introduction, Methods, Results and Discussion,独立短文：独立性The first studies by Shuford et al. (Polym Eng Sci 1976,16,25) of the effect of draw ratio on the piezoelectric properties of poly(vinylidene fluoride) films conc
4、luded that the effect of molecular orientation due to draw prior to film polarization was to increase greatly the piezoelectric response.,Compare the results, according to the equations (1), (2), (3), (4), defining inhibition type is competitive one. EI的文摘长度一般不超过150 words，或1500字母。 美国物理学会Style Manual
5、, 不超过500个单词。,对化学文摘两个最基本的形式：报道性文摘（informative abstract）It can and should briefly state the problem, the method used to study the problem, and the principal data and conclusions.,指示性文摘（indicative abstract）This type of abstract is designed to indicate the subject of a paper, making it easy for potentia
6、l readers to decide whether to read the paper.,摘要的基本内容与写法 The Abstract should provide a brief summary of the main sections of the paper:Introduction, Materials and Methods, Results, and Discussion. An abstract can be defined as a summary of the information in a document., The Abstract should never g
7、ive any information or conclusion that is not stated in the paper. The language should be familiar to the potentialreader. Omit obscure abbreviations. Write the paper before you write the abstract.,1 基本特性2 时态3 语态4 语法修辞5 一个典型示例6 化学常用句式,2 时态 以一般现在时为主，也使用一般过去时和现在完成时说法一：从理论上讲：一般现在时 通过科学实验取得的研究结果、结论，揭示自然
8、界的客观规律一般过去时 在一定范围内所观察到的自然现象的规律性认识，这种认识也许有一定的局限性现在完成时 表明过程的延续性，虽某事件（过程）发生在过去，但强调对现实所产生的影响,说法二： EI 数据库建议：用过去时态叙述作者工作；用现在时态叙述作者结论。,说法三论文是通过科学实验揭示客观真理。所取得的结果，无论是过去，还是现在或将耒都是如此。故常用现在时表达。 过去时“表达一件过去发生过的事，而且现在已经完结了。”如文中指出发生的日期和时间是写文章之前，必须用过去时，例：This was first known in 1930.,许多论文，虽然是作者过去做的工作和得到的结论，然而这些工作和结论
9、并不是达到“完结了”的阶段，而是还会有人，也可能是作者本人，继续研究下去，从而产生进一步的改进和完善。从这一角度出发，可以用现在完成时来描述已做过的工作，以表达这种延续性。,例：Man has not yet discovered an effective cure for the common cold. （人类至今尚未发现一种有效治疗感冒的方法。）句中隐含着估计一段时间后也不会发现，但是将耒能否会有，尚有待事实来说明。（参见：周春晖编著. 科技英语写作. 北京：化学工业出版社，2003）,举例一般现在时及其被动语态PET films uniaxially drawn in hot wate
10、r are studied by means of conventional DSC and modulated DSC (MDSC). Variations of Tg with the water content and with the drawing are discussed in terms of the structure in these materials. The increments of Cp at Tg are also interpreted using a three phases model.,The sources of noise in the instru
11、ment are discussed, and simple models and methods for reducing noise are presented.The instrument can be used for fast scanning calorimetry of submicrogram samples with sensitivity of 1 nJ/K and time solution of 5 ms.,The method has been successfully tested on materials of known critical cooling rat
12、es.The data have been analyzed by the McMillan-Mayer theory to determine the enthalpic interaction coefficients.,一般过去时及其被动语态 An analysis of the cure kinetics of several different formulations composed of bifunctional epoxy resins and aromatic diamines was performed. All kinetic parameters of the cur
13、ing reaction were calculated and reported. Dynamic and isothermal DSC yielded different results. An explanation was offered in terms of different curing mechanism which prevail under different curing conditions. A mechanism scheme was proposed to account for various possible reactions during cure.,现
14、在完成时及其被动语态 The partial molar enthalpies of mixing of NaHSO4 and KHSO4 have been measured at 528K by dropping samples of pure compounds into molten mixtures of NaHSO4 and KHSO4 in Calvet calorimeter. From these values the molar enthalpy of mixing has been deduced. The phase diagram of this system has
15、 been confirmed by conductometric and thermal analysis methods. By an optimization method the excess entropy of the liquid mixtures was also calculated.,应理解为上述时态是撰写摘要时常用的几种时态，有时很难区分它们在含义上的严格差异。上述3种说法并不矛盾，应当说是互相补充的。这只是从语法功能的角度将其概念化，实际写作英文摘要时，这几种时态并非完全不可互易。,1 基本特性2 时态3 语态4 语法修辞5 一个典型示例6 化学常用句式,3 语态目前，
16、英文摘要仍以被动语态具多（见上例），这种语态“可以在主语部分集中较多的信息，起到信息前置，语义鲜明突出的效果。”【1】主动语态也偶有出现，并有增长的趋势，认为“主动语态表达的语句文字清晰、简洁明快，表现力强，动作的执行者和动作的承受者一目了然，往往那给人一种干净利落、泾渭分明的感觉。”【1】,主动语态 举例 We report rheological data on anionic polyelectrolyte solutions of variable chain length and concentration, We have studied the dehydration under
17、 atmospheric pressure for , NiNa4(PO3)6H2O ,between 25 and 700 by thermal analyses (TG, DTA), infrared spectrometry and X-ray diffraction.,We find that one component (polyimide) controls the permeability values and activation energies for helium permeation in the blends.To examine the effect of elec
18、tric field on the aggregation structure of the particles, we observed light scattering of the suspension under an electric field, and found that the scattering pattern became anisotropic.,We demonstrate the thermally activated nature of the-PMMA and -P(VDF-TrFE) relaxation, with activation energies
19、of 29.3 and 13.5 kcal/mol, respectively. We refer to the lamellar thickening process as a type of secondary crystallization.,概括起来：作者告诉读者论述怎样的主题，可用现在时,用过去时及其被动语态叙述实验方法与过程；表示实验前业已完成的动作（过去的过去），用过去完成时。例如： The crystallized samples had been polished before they were etched in a 0.5 HF solution at a temper
20、ature of 25 for 2 s .对实验结果可用现在时（表示客观真理）或现在完成时（已取得的阶段性成果）。,关于结构式文摘韩仲琪，李炳汝，王庆法. 医学论文英文摘要格式及其写作问题. 编辑学报，2002，14（6）：412据统计，目前世界上约有60的核心生物医学期刊采用结构式摘要，但此种摘要不适合综述之类的文章。 结构式文摘是按Objective（目的）、Methods（方法）、Results（结果）和Conclusions（结论）逐一阐述论文的梗概。在Objective项，可直接用动词不定式的一般式主动语态，如To provide, To explore, ; Methods和Res
21、ults 项，可用一般过去时（有时也用现在完成时）及其被动语态；Conclusions 则用一般现在时,Objective 动词不定式开头 To investigate To study To explore To examine To determine To report To review 使用第一人称时，用凡指的we, the author, the authors ,不用I。 如：In this paper we conclude ,Methods 用完整的句子，以被动句和过去时态为主。Results 用一般过去时陈述实验结果。Conclusions 集中表达作者的学术观点。参见：刘
22、雪立.医学论文英文结构式摘要的写作，中国科技期刊研究，2003，14（4）：452,1 基本特性2 时态3 语态4 语法修辞5 一个典型示例6 化学常用句式,4 语法修辞吕萍，曹云立.科技期刊英文摘要的编写要求.编辑学报，2003，15（1）：35(1) 力求简洁at a temperature of 250 to 300 at 250 to 300 at a high pressure of 2 kPa at 2 kPahas been found to increase increasedfrom the experimental results, it can be concluded
23、that the results show,(2) 能用名词作定语的不用动名词作定语，能用形容词作定语的不用名词作定语measuring accuracy measurement accuracyexperiment results experimental results,(3) 可直接用名词或名词短语作定语的情况下，要少用 of 句型accuracy of measurement structure of crystal, measurement accuracy crystal structure,(4) 可用动词的情况尽量避免用动词的名词形式Measurement of thickne
24、ss of plastic sheet was made, Thickness of plastic sheet was measured,(5) 一个名词不宜用多个前置形容词来修饰，可改用复合词，兼用后置定语thermal oxidation apparent activation energy, apparent active energy of thermo-oxidation,(6) 句子的语法结构正确、语意清楚、逻辑合理The influence of dispersant in inverse suspension polymerization on the configurati
25、on of products are investigated存在的问题：1 谓语用的是复数2 冠词的使用，带有泛指性,可修改为 The influence of the dispersant agent on the configuration of the products in the inverse suspension polymerization was investigated.,偷换主语 Twenty tablets of enoxacin were weighed accurately and calculated the everage tablet weight., En
26、oxacin of 20 tablets was accurately weighed and the averaged tablet weight was calculated.,1 基本特性2 时态3 语态4 语法修辞5 一个典型示例6 化学常用句式,5 一个典型示例A detailed study of the melting behavior of oriented isotactic polypropylene has been carried out using differential scanning calorimetry. The orientation in isotac
27、tic polypropylene was produced by extruding it in solid phase. At extrusion ratio (ER ) greater four, two melting peaks were observed. With increasing ER, the lower temperature peak was found to shift to higher temperature. The corresponding shift in the higher temperature peak was much less. It is
28、shown that these peaks originate in the melting of crystalline species having different degrees of crystal disorder and stereo-block character.,此例回答了如下四个问题：回答做了什么? （研究工作范围） 用DSC 研究聚丙烯的熔融行为回答怎样做的? （实验要点）固体拉伸取向回答结果如何? （主要结果）两个熔融峰及其随拉伸比的变化回答原因何在? （结果的解释,结论）存在不同晶体,1 基本特性2 时态3 语态4 语法修辞5 一个典型示例6 化学常用句式,6
29、化学常用句式（1）研究范围（to be）carried out performedmadeconducted(to be) studied investigated(to be) described,deal with elucidated given presented developed employed derived prepared synthesized monitored determined measured,observed recorded examined characterized identified tested calculated proposed used t
30、o study used to establish evaluated discussed,(2) 实验要点 （to be） prepared by the reaction of with synthesized via reacting obtained via condensationby means ofby usingby the use ofusing as ,over a wide range of over a broad composition range over most of the range of over the entire range covered the
31、ranges from to in the range of in the temperature range from to with a variety of contents containing percent or more in the presence of in the absence of ,（3）主要结果主动语态（或被动语态）的表达形式（见上例 ）用That 从句表示实验结果The results indicate that The results show that The results demonstrate that The results reveal that
32、,由It 引起的that 从句It was shown that It can be seen that It was found that It was discovered that It was concluded that It has been demonstrated that ,It was clarified that It was revealed that It is considered that It was confirmed that It is suggested that It was supposed that It has become apparent t
33、hat ,以 to be 后的表语成分表示测定、计算等的结果The rate constant of the catalytic reaction was calculated to be 5.67x106 cm3 mol-1s-1.The theoretical equation was proved to be correct by the experimental results.,表示具有某种影响，以及数量的依赖、增减关系 与 有关 （to be）correlated with associated with related to dependent upon independent
34、of in relation to ,in a linear relationship with proportional to inversely proportional to depends on The dependence of on increase with the increase of decrease with the increase of ,（不）相符的表示方法 (to be) in good agreement with (to be) found to agree well with (to be) consistent with (to be) essential
35、ly identical with (to be) found to coincide essentially with , (to be) closely analogous to (to be) similar to Good agreement (to be) found between (to be) contrary to (to be) in contrast with ,（4）结果解释（结论） (to be) due to due to (to be) attributed to (may be) (to be) assigned to (to be) interpreted on the basis of can be caused by may be explained by originate in (to be) discussed in terms of ,
