一经 yījīng HSK7 once Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 这些规定一经发布,就必须严格执行。 zhèxiē guīdìng yījīng fābù, jiù bìxū yángé zhíxíng. These regulations must be strictly enforced as soon as they are issued. Source: Dong Chinese Dictionary