n.黑板

Who's rubbed my figures off the blackboard? 誰把我寫在黑板上的數(shù)字擦掉了?

Please raise your head and look at the blackboard. 請?zhí)痤^來，看黑板。

The teacher wrote on the blackboard with a piece of chalk. 老師用一支粉筆在黑板上寫字。

The teacher wrote down the new words on the blackboard. 老師在黑板上寫出新單詞。

blackboard由black+board合成而來,意為在其上用粉筆寫字的“黑板”。是可數(shù)名詞,有復數(shù)形式。