on the blackboard
英
美
- blackboard n.黑板
- on prep.在...之上；由...支撑着；在（某一天）；关于；基于adv.穿着；向前（移动)；表示持续性adj.表示已连接、处于工作状态或使用中；发生；值班
- the art.那；这；这些；那些adv.（用于比较级前）更加；用于最高级前；(用于形容词、副词比较级前)越...越...
- The boy stole from classroom while the teacher was writing on the blackboard.
老师在往黑板上写字时，那孩子偷偷溜出了教室。
- He took out a piece of chalk and wrote his problem on the blackboard.
他拿出了一支粉笔并在黑板上写下他的问题。
- The teacher wrote down the new words on the blackboard.
老师在黑板上写出新单词。
- The teacher wrote on the blackboard with a piece of chalk.
老师用一支粉笔在黑板上写字。
