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论文作者:英语论文论文属性:论文指导登出时间:2012-05-07编辑:lena ding点击率:35240
论文字数:17489论文编号:org201205071613031326语种:中文 Chinese地区:中国价格:免费论文
摘要:对我国青年学者或学生来说,用英语写作的难点不是没有写作材料,不是不熟悉专业词汇,也不是没有打下良好的英语基础。用英语写论文难,是因为不太了解学术英语的语言特点。关于学术英语写作的语言技巧,我们已在第一部分作了较详细的介绍。此部分讨论学术论文写作的方法,包括学术论文写作中常用的句型结构,我们都在此作较详细介绍,以便读者模仿练习,将写作工作化难为易。
例1
A Hybrid Internal Combustion Engine/Battery Electric Passenger Car for Petroleum Displacement I. Forster and J. R. Bumby INTRODUCTION [1] The finite nature of the world's oil resources and the general concern about automobile emissions have prompted the adoption of energy conservation policies and emphasized the need to transfer energy demand from oil to other sources of energy, such as natural gas, coal and nuclear. [2] A transfer of energy from oil to electricity can be achieved to a limited extent in the road trans- port sector by the increased use of electric vehicle. However, such vehicles are limited in range due to the amount Of energy that can he realistically stored on-board the vehicle without affecting payload. As a consequence of this, electric vehicles must he used in situations where daily usage is well defined, for example, in urban delivery duty. Indeed, it has been in such vehicles as the urban milk delivery vehicles that electric traction drives have been traditionally applied with a great deal of success. Currently the demand is for urban electric vehicles to he developed with greater traffic compatibility in terms of speed and range. 分析:第一层(第1—5段):介绍混合电动汽车的研究背景、意义、目前的发展水平,需要解决的问题等。第1段:指出混合电动汽车的研究背景。世界石油资源的有限性及人们对汽车排放问题的广泛关注使得能源转换问题尤为重要。第2段:使用电动汽车能够从某种程度上实现能源转换。但问题是电动汽车的续驶里程比内燃机车短。所以目前要解决的问题是提高电动汽车的速度和续驶里程。
[3] Although urban delivery vehicle applications will help to reduce the dependence of the road transport sector on petroleum-based fuels, the major part of this market requires vehicles that are not limited in range and have a performance compatible with internal combustion, i.e. engine vehicles. The use of advanced traction battery technology to overcome the range limitation of electric vehicles is one possible solution. However, this would still result in a vehicle limited in range and may in itself create additional problems. For example, due to the much greater on- board stored energy, the charging time required will be greater than at present. [4] The range limitations of the pure electric vehicle can be overcome by using a hybrid i.c. engine/electric drive which incorporates both an i.c. engine and an electric traction system. Al- though such a vehicle can be designed to meet a number of objective本论文由英语论文网提供整理,提供论文代写,英语论文代写,代写论文,代写英语论文,代写留学生论文,代写英文论文,留学生论文代写相关核心关键词搜索。