A speech form or an expression of a given language that is peculiar to itself grammatically or cannot be understood from the individual meanings of its elementskeep tabs is an idiom 聚精会神是一句成语A style of artistic expression characteristic of a particular individual, school, period, or mediumthe idiom of the French impressionists; the punk rock idiom.法国印像主义风格;疯狂摇滚乐风格