drawing board

1. N-COUNT A drawing board is a large flat board, often attached to a metal frame so that it looks like a desk, on which you place your paper when you are drawing or designing something. 绘图板

2. PHRASE If you say that you will have to go back to the drawing board, you mean that something which you have done has not been successful and that you will have to start again or try another idea. 从头再来[PHR after v]