Introduction部分在Abstract之后出现。Introduction部分应向读者简要概述你的主题和研究的原因。Introduction是设置研究背景并给读者留下良好第一印象的最好场所。
Introduction通常占论文总字数的10-15%，例如，如果你的论文总字数是3000，那么你应该把Introduction定在400个字左右。通常建议在完成论文的其他部分后编写论文的Introduction部分。
这是因为在看到论文大局之前，很难弄清楚在论文的Introduction部分到底要放什么内容。
Introduction部分应该让读者感觉到你对研究的自信心，并用适当的参考文献来支撑你的观点。阅读Introduction部分后，读者必须清楚地了解研究论文的其余部分要做什么。
研究论文的Introduction部分应包括以下内容：
- （1）总体介绍
- （2）问题定义
- （3）研究现状
- （4）问题解决方案
- （5）研究动机
- （6）研究目标
- （7）研究的意义和优势
本期主要介绍（1）总体介绍，（2）问题定义，（3）研究现状的常用句式。
其他内容请看下期！
1. 总体介绍
Research on __ has a long tradition
关于__的研究有着悠久的传统。
For decades, one of the most popular ideas in __ research is the idea that __
几十年来，__研究中最流行的观点之一是__。
Recent theoretical developments have revealed that __
最近的理论发展表明__。
A common strategy used to study __ is to __
研究__的常用策略是__。
This research constitutes a relatively new area which has emerged from __
这项研究是由__产生的一个相对较新的领域。
These approaches have been influential in the field because of __
由于__，这些方法在该领域产生了影响。
In the past several decades, __ have played an important role in __
在过去的几十年里，__在__中起了重要的作用。
There are growing appeals for __
有越来越多的人呼吁__。
This is the field of study that deals with __
这是研究__的领域。
Most of the theories of __ are however focused on explaining __
然而，大多数关于__的理论集中于解释__。
There are three major theoretical and conceptual frameworks for __ __
有三个主要的理论和概念框架用于__。
The field has gradually broadened as __
这一领域逐渐扩大为__。
This field of study is sometimes referred as __
这个研究领域有时被称为__。
This has been widely adopted in the field of __
这已被广泛采用于__领域。
This thesis considers the field of __ as the main subject of its study
本文以__领域为主要研究对象。
One of the major topics to be investigated in this field is __
这一领域的主要研究课题之一是__。
This field closely follows the paradigm of __
这个领域紧跟__的模式。
The field has met with great success in many problems __
这个领域在许多__问题上取得了巨大的成功。
This is not particularly new and has been used for many years in the field of __
这并不是特别新，在__领域已经使用多年。
This field closely follows the paradigm of __
这个领域紧跟__的模式。
Widely considered to be a good way to __
人们普遍认为这是一个好办法。
This has been widely adopted in the field of __
这已被广泛应用于__领域。
This phenomenon has been widely observed
这一现象已被广泛观察到。
A common technique is to __
一种常用的技术是__。
This is a technique common in __
这是__常用的一种技术。
There are several common kinds of __
有几种常见的__。
2. 问题定义
This seems to be a common problem in __
这似乎是__的一个普遍问题。
This leads to myriad problems in __
这导致了__的无数问题。
The main problem is that __
主要的问题是__。
There is a further problem with __
关于__还有一个更深层次的问题。
One primary problem with __ is that __
关于__的一个主要问题是__。
The methods are not without their problems as will be discussed in __
这些方法并非没有问题，我们将在__中讨论这些问题。
The foremost problems are the facts that __
最重要的问题是__。
This makes up for the problem of __
这就解决了__的问题。
This is a complex problem and to simplify it requires __
这是一个复杂的问题，简化它需要__。
A challenging problem which arises in this domain is __
在这一领域出现的一个具有挑战性的问题是__。
These problems are difficult to handle __
这些问题很难处理__。
This is typically a complex problem __
这通常是一个复杂的问题__。
A well-known problem with __ is that it does not take into account the __
关于__一个众所周知的问题是它没有考虑到__。
One of the problems is that it considers only the __
问题之一是它只考虑了__。
The key problem with this technique is __
这项技术的关键问题是__。
It is usually an ill-posed problem in the case of __
在__情况下，这通常是一个不适应的问题。
This problem is well-posed and does not require to impose __
这个问题是恰当的，不需要强制执行__。
This appears as a more straightforward problem compared to the __
与__相比，这似乎是一个更简单的问题。
This turns out to be even more problematic because __
这就更有问题了，因为__。
The problem with such an implementation is that __
这种实现的问题是__。
This poses some problems when carrying out the __
这在执行__时提出了一些问题。
This problem has attracted more attention in the field of __
这个问题在__领域引起了广泛关注。
This is a basic chicken-and-egg problem because __
这是一个鸡生蛋还是蛋生鸡的基本问题，因为__。
Unfortunately, this approach results in problems related to __
不幸的是，这种方法导致了与__有关的问题。
These constraints make the problem difficult to __
这些限制使问题难以解决__。
Most of the research in this field is aimed at solving this problem.
这个领域的大多数研究都是为了解决这个问题。
This remains an open problem in the area.
这在该地区仍然是一个悬而未决的问题。
This problem has received substantial interest.
这个问题引起了极大的兴趣。
These examples highlight the problem that __
这些例子突出了__的问题。
The main practical problem that confronts us is __
我们面临的主要实际问题是__。
3. 研究现状
There is no previous research using __ approach.
之前没有使用__方法的研究。
As far as we know, no previous research has investigated __
据我们所知，以前没有研究过__。
There has been less previous evidence for __
之前关于__的证据较少。
Other studies have failed to __
其他的研究未能证实__。
To our knowledge, no study has yielded __
据我们所知，没有一项研究取得了__成果。
No study to date has examined __
到目前为止，还没有研究考察过__。
Only a few studies have shown __
只有少数研究表明__。
However, __ has rarely been studied directly.
然而，__很少被直接研究。
Moreover, few studies have focussed on __
此外，很少有研究关注__。
In particular no study, to our knowledge, has considered __
据我们所知，没有一项研究认为__。