It depends on whether the content is patented or the author's characteristics. If it's popular, it certainly doesn't count. For example, articles are all composed of Chinese characters, and no one has ever included Chinese characters as plagiarism.

catalogue

A table of contents is a short list of main paragraphs in a paper. (Essays don't need to be listed in the table of contents)

abstract

It is an excerpt from the main content of the article, which requires short and concise content.

Keyword definition

Keywords are selected from the title, abstract and text of the paper, which are words with substantial meaning to express the central content of the paper. Keywords are words used by computer systems to index the content characteristics of papers, which are convenient for information systems to collect and provide readers with retrieval. Generally, 3-8 words are selected as keywords for each paper, and a new line is set at the bottom left of the "abstract".