introduction部分虽然字数只占整篇论文的10%~15%的样子，虽然字数少，但是并不代表就可以敷衍了事。
论文的引言部分要向读者传递几个重要信息：
First概述论点
你将要阐述的主题和观点；
Next展示写作风格
以简洁明了的方式来呈现论文内容；
Once again说明论点的意义
为什么这个观点对于研究或社会具有重要意义；
Finally提前讲述如何论证你的观点，并给读者一个初步印象。
惊艳教授的Introduction模板句
Establishing the importance of the topic for the world or society
●X is essential for a wide range of technologies.
●Xs are the most potent anti-inflammatory agents known.
●There is evidence that X plays a crucial role in regulating .
●X is a common condition which has considerable impact on …
●In the new global economy, X has become a central issue for…
Establishing the importance of the topic for the discipline
●X has been the subject of many classic studies in…
●X has been instrumental in our understanding of .. .
●The theory of X provides a useful account of how….
●X is an increasingly important area in applied linguistics.
●The issue of X has received considerable critical attention.
●X has long been a question of great interest in a wide range of fields.
Establishing the importance of the topic (time frame given)
●Recently, there has been renewed interest in
●One of the most important events of the 1970s was …
●Recently, researchers have shown an increased interest in .
●Over the past century, there has been a dramatic increase in …
●Recent trends in X have led to a proliferation of studies that….
●X proved an important literary genre in the early Y community.
Establishing the importance of the topic as a problem to be addressed
●lt is now well established that X can impair .
●X has led to the decline in the population of ..
●X is a growing public health concern worldwide.
●Lack of X has existed as a health problem for many years.
●X is a major environmental problem, and the main cause of…
Referring to previous work to establish what is already known
●lt has previously been observed that .
●Several attempts have been made to …
●Recent work by historians has established that ..
●Previous research comparing X and Y has found ..
●A considerable amount of literature has been published on X. These studies …
●Surveys such as that conducted by Smith (1988) have shown that
ldentifying a controversy within the field of study A much debated question is whether …
●In the literature on X, the relative importance ofY is debated.
●One observer has already drawn attention to the paradox in …
●Questions have been raised about the use of animal subjects in ..
●In many Xs, a debate is taking place between Ys and Zs concerning …
●Debate continues about the best strategies for the management of
Explaining the inadequacies of previous studies
●Previous studies of X have not dealt with …
●Researchers have not treated X in much detail.
●Such expositions are unsatisfactory because they…
●Previous published studies are limited to local surveys.
●Although extensive research has been carried out on X, no single study exists which .
●However, these results were based upon data from over 30 years ago and it is unclearif .
●The experimental data are rather controversial, and there is no general agreement about
●Most studies in X have only been carried out in a small number of areas.
ldentifying the paucity or lack of previous research There has been little quantitative analysis of…
●Data about the efficacy and safety of X are limited.
●Up to now, far too lttle attention has been paid to .
●In contrast to X, there is much less information about effects of …
●A systematic understanding of how X contributes to Y is still lacking.
Identifying a knowledge gap in the field of study
●lt is still not known whether …
●Very lttle is currently known about X in .
●Causal factors leading to X remain speculative.
●The neurobiological basis of X is poorly understood.
●To date, only a limited number of Xs have been identified.
●The mechanisms that underpin X are not fully understood.
●This indicates a need to understand the various perceptions ofX that exist among“
●It is now well established that . However, the influence of X on Y has remained unclear.
Stating the purpose of the current research
●The specific objective of this study was to
●An objective of this study was to investigate ..
●This thesis will examine the way in which the …
●This study set out to investigate the usefulness of..
●This prospective study was designed to investigate the use of…
●This research examines the emerging role of Xin the context of..
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