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blackboard [blackboards]▼(a surface that can be written upon with chalk)noun[UK: ˈblæk.bɔːd] [US: ˈblæk.ˌbɔːrd]
whiteboard▼(large vertical writing area)noun[UK: ˈwaɪt.bɔːd] [US: ˈwaɪt.bɔːrd]
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