n.黑板
Who's rubbed my figures off the blackboard? 谁把我写在黑板上的数字擦掉了?
Please raise your head and look at the blackboard. 请抬起头来，看黑板。
The teacher wrote on the blackboard with a piece of chalk. 老师用一支粉笔在黑板上写字。
The teacher wrote down the new words on the blackboard. 老师在黑板上写出新单词。
blackboard由black+board合成而来,意为在其上用粉笔写字的“黑板”。是可数名词,有复数形式。
