应运而出
yìng​yùn'ér​chū

emerge as required by circumstances

  1. 应运 應運 yìng​yùn
    to conform with destiny
    to conform with fate or timing; to arise or act as the occasion demands; often used in the phrase 应运而生 yìng​yùn'ér​shēng
  2. 而 ér particleconjunction
    [adverbial linker]
    Connects an adverb-like description to the following verb to show the manner, cause, or basis of an action.
  3. 出 chū verbnoun
    to appear
    to appear; to manifest; to show; to become visible