reality check
noun [ C usually singular ] uk/riˈæl.ɪ.ti ˌtʃek/ us/riˈæl.ə.t̬i ˌtʃek/
面对现实；反思现实
an occasion that causes you to consider the facts about a situation and not your opinions, ideas, or beliefs
The recent failure of so many internet businesses has provided a reality check for those who predicted huge profits. 最近很多网络公司的破产使很多预测可以赚得巨额利润的人不得不面对现实进行反思。