a large flat board used for holding a piece of paper while a drawing or plan is being made 绘画板；图画板；制图板 an architect’s drawing board 建筑师的制图板
Idioms
(go) back to the drawing board
to start thinking about a new way of doing something after a previous plan or idea has failed （失败后）另起炉灶，从头开始 They rejected our proposal, so it’s back to the drawing board. 他们拒绝了我们的建议，所以我们只好从头开始了。
on the drawing board