Idiom: "(to) go back to the drawing board"
Definition:
to start over from the beginning
Examples:
1) After our new business went bankrupt, we decided to go back to the drawing board.
2) My boss told me my idea was not creative enough, so I had to go back to the drawing board.
中文解释： http://www.youzienglish.com/main/idiom_of_the_day/to_go_back_to_the_drawing_board/cn/
