back to the drawing board
US /bæk tu ðə ˈdrɔɪŋ bɔrd/
UK /bæk tu ðə ˈdrɔɪŋ bɔrd/

1.
从头再来, 回到起点
to start again on a plan or idea because the previous one has failed
:
•
Our first attempt failed, so it's back to the drawing board.
我们第一次尝试失败了,所以要从头再来。
•
The client rejected the design, so we're back to the drawing board.
客户拒绝了设计,所以我们要从头再来。