the KISS principle
noun🔊/ðə ˈkɪs prɪnsəpl/
🔊/ðə ˈkɪs prɪnsəpl/
[singular] (especially North American English)the idea that products and advertising should be as simple as possible （产品与广告的）最简原则，单纯原则 Word OriginFormed from the first letters of the expression ‘Keep it simple, stupid’.