(1) Explain to the society? The data published by the national data website can support the environment.

First, describe the background of the research. For example, if you want to study a new type of building materials, you should start from the vast field of building materials, and you can use the data published by some national data websites as a support to illustrate the importance of building materials to today's society. The purpose is to introduce the importance of this paper to the research of special new building materials.

(2) Explain this again? Industry? The environment can use industry reports as data support.

This part needs to gradually transition from the background of big industry to the background of its own research field, that is, from building materials to a new type of building materials studied by itself, explaining the importance and advantages of this material, and citing the data in the industry report as support.

(3) explain it again? Problems to be solved urgently

The first part explains the importance of my research content, which makes a turning point and explains the problems existing in the current research. It can be written as follows: "However, the existing research has limitations in XXX and does not consider XX."

(4) The main research content of this paper.

After talking about the main problems in the last part, this part needs to explain the methods to solve the problems. You can refer to the following text: "This paper considers XX factors, constructs XX model based on XX theory, puts forward XX method and studies XX problems."