Euphemism: Please don't park here, or you will be fined!
Analysis: Euphemism means that the words are more implicit, plus the word "please" that is respectful and friendly. Respect others, be polite and be more civilized. The original sentence is blunt, and it is more acceptable to use euphemism.
Extended data:
Because the writing of slogans is limited by specific occasions, expressions and the level of information recipients, slogans cannot use longer sentences. Short sentences, few words and accurate expression are the basic requirements of concise slogan language.
Slogans are usually written on paper, walls or cloth. In order to stand out, fonts are generally larger. Because of people's sight, the number of words should not be too much.
If a slogan has too many words, dozens or even hundreds, it is too troublesome for the writer and difficult for the reader to understand.
For example, just like the words "wait ten minutes, don't grab a second", it clearly tells people to obey the traffic rules.