雅思口语天天练：留学生活中的高频口语3

　　twenty-four seven=24 hours a day, 7 days a week=all the time永远，一直

　　go for a song=be sold very cheaply贱卖

　　bucket down=rain very heavily瓢泼大雨

　　be messed up 一团糟

　　below the mark=not measure up不够格