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What does reference 2019,34 (07) mean?
20 19 Volume 34, Issue 7.

Reference 20 19 refers to the year when this article was published, followed by the periodical number of this article, which is relatively scientific and allows readers to easily find the source of this document.

Literature refers to books, periodicals and regulations with historical significance or research value. It is the final expression of scientific research and technological research achievements, and it is an important medium for people to acquire knowledge.