blackboardblackboard /ˈblækbɔrd/ ●●● noun [countable] 
a board with a dark smooth surface, used in schools for writing on with chalk
a board with a dark smooth surface, used in schools for writing on with chalk
| 单词 | blackboard |
| 释义 | blackboardblackboard /ˈblækbɔrd/ ●●● noun [countable] a board with a dark smooth surface, used in schools for writing on with chalk |
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