blackboard用法例句
1、There was a blackboard with seven names chalked on it.
黑板上用粉筆寫着7個人名。
2、Teaching off a blackboard is boring, and undoubtedly turns people off.
照本宣科枯燥乏味，無疑會使人們喪失學習興趣。
3、With a stick of chalk he wrote her order on a blackboard.
他用一截粉筆將她的指示寫在黑板上。
