busboy：a young man whose job is to take away dirty dishes from the tables in a restaurant
餐厅勤杂工
busybody ：someone who is too interested in other people's private activities -- used to show disapproval
爱管闲事的人
eleventh hour
最后的时刻

a Capital Idea
极好的主意
Jack is a green hand at doing this work.
在这个工作上，Jack是新手。
horse sense = common sense
常识