剑桥词典the evening before a day when children have to go to school . Adults also use this expression informally to describe the evening before a day when they have to get up to go to work . （儿童）上学前一天的晚上；（成人）上班前一天的晚上 I don't usually stay out this late on a school night . 明天要上班，我一般不会这么晚还不回家。 返回 school night