to be done or come into existence suddenlyانجام شدن یا به طور ناگهانی به وجود آمدنThis crisis didn't happen overnight. Do not expect this to happen overnight; progress takes time. The index’s downslide has not happened overnight.منابع• https://dictionary.cambridge.org/dictionary/english/happen• https://www.collinsdictionary.com/sentences/english/happen-overnight+ عکس و لینک
