作为文章的开头部分，introduction地位可谓是举足轻重了！好多宝子写文章的时候，在这一步就被卡住了

今天就给大家说一些高分句式方便大家拿去直接使用

-一般介绍

The field has met with great success in many problems ...

The field only really took off in the late …as it became more accessible to ...

-研究背景和重要性

For decades, one of the most popular ideas in .…. literature is the ideathat...

Recent theoretical developments have revealed that..

-问题定义

Most of the research in this field is aimed at solving this problem.

This remains an open problem in the area.

-引出本文的研究课题

The specific objective of this study was to...

This study had a specific objective to determine..

-解决问题

An alternative approach to the problem is ...

This can be applied to solve these problems.

A number of works have shown that this problem can be overcome by using..

希望吃透方法个模板的宝子都能写出80+essay！加油呀~