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杞:周代诸侯国名,在今河南杞县一带。杞国有个人怕天塌下来。比喻不必要的或缺乏根据的忧虑和担心。
(1) [like the man of Qi who was haunted by the fear that the sky might fall]∶《列子·天瑞》:“杞国有人忧天地崩坠,身亡所寄,废寝食者”。传说杞国有个人怕天塌下来,愁得寝食不安 (2) [with unwarranted anxiety]∶比喻不必要的忧虑