地道俚语精华版收集

red-letter day:an important day, or a day that you will remember, because of something good that happened then 重要纪念日;喜庆日

This is a red-letter day for Susan. She made her first sale to a very important client.

今天是susan的大日子.她和一个非常重要的客户做成了第一笔生意.