The same reference to echo also means different but the same. In modern Chinese, this means that someone's works or words are similar to others. There is an ancient saying about the origin of similarity: everything reacts at the same time when it thunders. In the Book of Rites, Qu Li said: "There is no need to suppress it, nor does it need to conform to Zheng Xuan's Hanshu:" When thunder thunders, everything rings at the same time.
Use your own heart to judge right and wrong, don't take other people's opinions as your own, just like listening to thunder in everything. "Now we don't often use the original intention of the same word, but use this word to criticize those works that lack originality and copy everywhere. No matter the nouns directly extracted from the title or some words extracted from the sub-title, text or abstract, in order to be suitable for "degree", a single concept must be marked to avoid compound concepts.
The key words of "problems and countermeasures in law enforcement of grass-roots police" cited in this paper are "law enforcement quality, law enforcement image and quality education" This article quotes three key words, none of which are in the title or subtitle of the article. No one can see the image and quality of law enforcement without looking at the headlines and only looking at the keywords. Who is the target of quality education? Obviously, these three keywords are not specific, but compound concepts.
It is a single concept that people can see at a glance. This article is about grass-roots police. In addition, the two key words of law enforcement and "law enforcement image" are somewhat similar in a sense, and the quality often reflects a person's image.