现在整个科研社会，对于SCI的要求是越来越高了。学校的博士生要求两篇二区的SCI，才能达到毕业要求。

但是说实话，学院很多老师都没发过二区的文章。而且最近听说以前读书的学校，现在硕士生也要求SCI才能毕业，对于别的专业来说可能不难，但是对于某些领域来说，要求确实很高了。

所以大家SCI写作现在是越来越重视了。SCI写作难不难？当然难。这种难不光是内容上的，还包括语言上的。一般国内学者投稿不会投中文SCI期刊，所以基本上都是英文的。有时候就算你内容特别好，

你想把它用地道的英语表达出来也不容易。不过再难的东西，我们也可以试着去寻找一下它的规律，SCI论文写作的表达肯定也是有规律可寻的。

为了让你们写文章能更轻松一些，我就把我总结的一些表达的规律告诉你们，你们拿到之后可以直接使用，稍微调整一下个别单词，也不用担心重复问题。因为一篇SCI论文可以分成很多部分，每一部分的语言表达又是不一样的，今天我就先给大家介绍一下Introduction部分，Introduction部分也分成好几块，我就挨个给大家介绍一下。废话不多说了，准备好了我们就开始吧。

简单地说一下，国内外已经有很多人在做相关研究了。

The literature is reviewed to examine available methods that could be used to __ (...)

A review of the literature conducted shows that there are no suitable methods already for __ (...)

The literature was reviewed for possible methods to __ (...)

An up-to-date overview of methods used for __ is presented. (...)

It is important to have some awareness of current issues highlighted in the literature. (...)

This section outlines the existing methods available in the literature for __ (...)

This section discusses the literature in the field. (...)

The literature review pays special attention to the class of methods central to our research. (...)

Different solutions available in the literature to solve this problem have been reviewed. (...)

These citations are related to the work presented in this thesis. (...)

The methods in the literature that are the most immediately relevant are reviewed. (...)

An overview of the previous and current attempts to develop this method is given. (...)

A good overview of the research in this area is provided here. (...)

The literature review describes the previous and current attempts to address this issue. (...)

The review provides details of the strengths and weaknesses of existing methods in the literature. (...)

A review of the current state-of-the-art in the field is given. (...)

A considerable amount of review of previous work in the subject area is given below. (...)

The aim of this review is to compare state-of-the-art techniques. (...)

Some of the essential or seminal developments in this area are reviewed. (...)

This section reviews some of the most pertinent papers on __ (...)

The major areas of research in this area are explained. (...)

This has been of interest for a considerable period, ranging from the early __ (...)

There exists a very extensive literature on the topic of __ (...)

In the literature, these have been extensively investigated in an attempt to __ (...)

There is also a large body of work in this area considering __ (...)

This is widely reported and extensively explored in the literature by __ (...)

These have been important topics of study in the literature for many years. (...)

This has been studied by several authors in the literature. (...)

Within the literature, there has been much research surrounding concepts of __ (...)

There is a body of research that has focused extensively on __ (...)

There are a broad interest and literature base for __ (...)

Over the last x years, much research has examined __ (...)

Research in this field is dominated by providing solutions to this problem. (...)

This problem has attracted considerable attention in the literature. (...)

An enormous amount of work has been carried out in this area. (...)

With respect to this specific subject, there has also been significant work. (...)

These issues are well covered in the literature related to this subject. (...)

There is a large amount of literature on this research. (...)

There has been a lot of work on the __ (...)

The literature on this topic is plentiful and easy to find. (...)

There are few examples available in the literature on this subject. (...)

These are well studied and documented in the literature. (...)

There exist quite a lot of discussions in the literature as to __ (...)

A large body of work has been completed using these methods. (...)

These important issues have been largely discussed in the literature. (...)

This has been much investigated in literature. (...)

This has been extensively discussed in the literature. (...)

There is a large body of literature surrounding the __ (...)

This subject has been extensively explored in the literature. (...)

Several studies have explored the effects of __ (...)

There have been several attempts to __ (...)

There have been multiple previous attempts to __ (...)

A number of studies have examined the __ (...)

Several investigators have probed if __ (...)

In the last decade, various studies have determined the effect of __ (...)

In order to test this concept, a number of studies have investigated the __ (...)

There have been a number of studies that have investigated the effectiveness of __ (...)

Several studies have been published examining the impact of __ (...)

A number of studies and reviews have been undertaken to explore the __ (...)

A significant variety of designs of this system is found in the literature. (...)

A multitude of such approaches has been presented in the literature. (...)

如果是具体到现在有人在做这个研究。

A recent systematic review investigated the __ (...)

More recent work by [ref] used __ (...)

Recently, a __ was reported in the literature. (...)

This issue has been considered by recent work [ref]. (...)

The most recent and advanced theory proposed by [ref] offers a new approach for __ (...)

More recent work in this area [ref] extends the methods by using __ (...)

From the literature, several recent approaches use a __ (...)

A number of techniques have been proposed in the recent literature on __ (...)

The most recent work in this area centers around the __ (...)

Here we examine two recent examples of work in this area that concentrate on __ (...)

The most recent method is the one proposed by [ref]. (...)

More recently, there have been several attempts at __ (...)

New methods have recently emerged in the literature to address the __ (...)

This is a relatively recent work in this direction. (...)

Two recent studies have found that __ (...)

New developments are mainly presented in [ref]. (...)