blackboard是黑板的意思。Ifyouwriteontheblackboard,rubitoffattheendofthelesson.如果你在黑板上写字，下课时要擦掉。Hestooduptogetabetterviewoftheblackboard为了更清楚地看到黑板上的内容，他站了起来。

Iwrotethedateatthefarleftoftheblackboard.我把日期写在黑板的最左边。Teachingoffablackboardi***oring,andundoubtedlyturnspeopleoff.照本宣科枯燥乏味，无疑会使人们丧失学习兴趣。Iturnedaroundandwrotethetitleontheblackboard我转过身，在黑板上写下了题目。