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分析：例3摘自一篇关于俄亥俄东南部地区橡树与山核桃科树木生长状况的研究论文。第1句：对研究内容的总体概括。第2～5句：总结研究结果，即某些树种死亡的原因是害虫、病菌和气候。其中第2句概括这些原因，第3～5句是具体结果及原因：有些林区的树木死亡率为40％，但是20％属于正常现象；有些树种死亡现象明显，原因是病菌的侵害。第6句：引用他人的研究结果和观点，以解释上述结果。害虫和病菌的侵袭所造成的树木死亡是一种自然和必然的现象。第7句：指出以后的研究方向。下面一则结论摘自一篇关于学校科技活动项目是否有助于达到科学教育目标的研究论文。
例41Science projects appear to be an important part of science education. 2Teachers feel that student science projects are meeting the educational goals for science. 3Experience through modeling the necessary skills in the classroom has the strongest relationship to science projects meeting these goals. 4Participation in a science fair beyond the local level, and supportive help from parents and other adults may also improve the effectiveness of student science projects. 5By utilizing these methods, more teachers may be able to address the goals of the National Science Teachers Association.
分析：第1—2句为总体结论：学校的科技活动是科技教育中的一个重要组成部分。教师认为，学生的科技活动有助于实现科技教育目标。第3～4句为两条具体结论：第一条结论是：课堂上的模拟操作活动经验与实现科技教育的目标有密切关系。第二条结论是：参加科技博览会、父母或其他成人的支持可以提高学生科技活动的效果。第5句展望未来趋势。从上述例子可以看出，通过一项研究工作，可能会得出几条结论，这些结论的主次轻重可以从字里行间表现出来。如例4中的第3句话通过使用…has the strongest relationship…点出了最主要的结论，而在第4句话中运用…also…这个词，来表示递进关系，说明这句话陈述的内容是研究结论之二。有时为了清楚醒目，可以将结论列成几条，例5和例6都是如此。
例5Conclusions(1) A systematic crashworthiness ( 碰撞性能) development of a lightweight electrical vehicle with aluminum front structure and composite (复合材料) passenger compartment is successfully completed and discussed here. Nonlinear finite element analysis (非线性有限元分析法) is used extensively to design and optimize the aluminum structure. (2) Implementation of damage mechanics models in the nonlinear crash codes reliably predict the post-yield behavior of aluminum components, and therefore, the codes can be successfully used for crashworthiness development of metallic structures with limited ductility (韧性有限的金属结构).(3) Even though crash analysis of composite members is not possible at this time, current modeling technology provides sufficient information about their design.(4) Development of material models in crash analysis codes to simulate the crash behavior of composite components can help to develop composite front-end structures for crashworthiness performance.
例6 Conclusions In this paper, a new prototype model of micropump(微小医用泵) using ICPF actuator (驱动控制器) is proposed.
英文论文的标点
Punctuation
Bad punctuation can often make even the best writing unintelligible. On the other hand, good punctuation can make your meaning clear and your language effective. English punctuation generally differs from that of other European languages; even though there is often considerable room for personal preferences, a mastery of the basic rules is indispensable.
There is one overriding principle: to use the bare minimum of punctuation necessary to keep the writing intelligible. The following list of rules makes no claim to exhaustiveness.
I. The Apostrophe (')
1. men's, women's, children's, people's
It is correct to write this area's problems, meaning "the problems of this area", and these areas' problems, meaning "the problems of these areas": in fact, putting apostrophes anywhere else would be wrong. But the plurals of man, woman, and child are exceptions to this general rule: thus we write the men's wives, the women's husbands, the children's mothers, and nothing else.
Another important exception is the word people when it denotes the plural of "person": thus we would write these people's behavior, meaning "the behavior of these pers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。