杞人忧天的解释 (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 unwarrant...