怎样写好英文论文的 Introduction 部分？

1、背景叙述
从背景、现状引出research field
高分句式：
For decades,one of the most popular ideas in…literature is the idea that .
In the past several decades,.have played an important role in…
Research on…has a long tradition
Recent theoretical development has revealed that.…
There are growing appeals of..
One of the major topic in this field is
Recently,the problem of X has aroused people’s concern
XX has brought a lot of benefits as well as problems
Nowadays,X has became a serious problem for..
It is commonly believed that

2、引出研究主题
争议点、research gap、可以和第一部分合并
高分句式：
The main problem is that
A challenging problem which arises in this domain is .
One of the problems is that it considers only the
It is usually an ill-posed problem in the case of.
This turns out to be even more problematic because…
These examples highlight the problem that
The problem with such an implementation is that
This seems to be a common problem in .
There has been less previous evidence for
Other studies have failed to

3、研究目的和目标
通过对背景的阐述，引申到一个具体的话题，并提出文章的核心论点
高分句式：
The aim of this work is to develop
The overall goal of this work is to
In this paper,we will focus on…
The purpose/intention/goal/objective/aim of this paper is…
In this paper,we present a .approach to
The overall goal of this thesis was to pursue
One of the major aims of this work was to create
The main objective is to investigate
Generally,it will argue that
Based on analysis,it will conclude that
It should be realized that
Taking all perspecyives into consideration，it could come to the conclusion that .

4、文章结构概述
介绍文章的结构，每个部分分别讲述什么，为了证明核心论点，将从哪些角度去论证
高分句式：
This paper will be followed by
The structure of this paper is as follows
This paper will be divided into X parts
To begin with,it will provide a brief
First of all,it is worth considering…,
Secondly….Thirdly…Futhermore,…/In addition,…