twenty-four seven = 24 hours a day, 7 days a week = all the time 永遠，一直
　　go for a song = be sold very cheaply 賤賣
　　bucket down = rain very heavily 瓢潑大雨
　　backroom boys 幕后英雄
　　pull one’ s leg = tease someone 開某人玩笑
　　break one’ s back 辛勤工作
　　below the mark = not measure up 不夠水平，不合格
　　beyond compare 的，最棒的
　　break even 不賠不賺
　　by the book 照章辦事
　　cast a cloud over 潑冷水，是蒙上陰影