資料來源 : pyDict

C黑板

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Blackboard \Black"board`\ (-b[=o]rd`), n.
   A broad board painted black, or any black surface on which
   writing, drawing, or the working of mathematical problems can
   be done with chalk or crayons. It is much used in schools.

資料來源 : WordNet®

blackboard
     n : sheet of slate; for writing with chalk [syn: {chalkboard}]