For example:

There is a saying in the article that "when pouring concrete, some workers do not vibrate the concrete thoroughly, resulting in bubbles in the concrete, which directly affects the stress state and capacity of the concrete."

If only the label "directly affecting the stress state and bearing capacity of concrete" is quoted, it will be marked before the period, and if the whole sentence is quoted, it will be marked after the period.

References are coded with Arabic numerals in the order in which they appear in the text, and the serial numbers are written in square brackets. If the document is repeatedly cited, use the same serial number in the text, and list the page number (or page number range) of the document cited once in the following references. The format is "publication year" of the work or "year, volume (issue)"+":page number (or page number range) of the periodical.

In the introduction (or introduction, introduction) part of the abstract, the following contents should be clearly written:

(1) First of all, explain the purpose of writing, and make clear the topics, problems and research fields of the review.

(2) Point out the general trend of published literature on review topics, and explain the definitions of related concepts.

(3) It is necessary to define the scope of the review, including the subject scope and time range involved in the special topic, and to specify the starting and ending years of the cited documents, as well as the standards for interpreting, analyzing, comparing and organizing the review order of the documents.

(4) Briefly explain the current situation of relevant issues or the focus of debate, and lead to the core theme of the written abstract, which is the most concerned and interested by readers and the main line of writing the abstract.

Refer to the above? Baidu Encyclopedia-References