详细解释:a. 有特殊意义的, 用红字表示的
英语解释:
形容词 red-letter:
memorable for being a special occasion详细解释:
red-let.ter
adj.(形容词)Memorably happy:值得纪念的喜庆的:例句:a red-letter day.值得纪念的吉日
来源:[From the practice of marking in red the holy days in church calendars] [由用红色在教堂日历上标志出宗教节日的习俗而来]