chalkboard的用法和樣例：
例句
用作名詞 (n.)
- The map was drawn on a chalkboard with ink-markers.
那張地圖用記號筆畫(huà)在一塊黑板上。 - Then one morning we were working math problems at the chalkboard.
后來(lái)有一天早晨，我和瑪麗在黑板上寫(xiě)下了數字題目。
詞匯搭配
- blackboard 黑板
