unblank

例句：

1. 1. After the meeting, we unblanked all the notes on the board.
   会议结束后，我们擦掉了黑板上的所有笔记。
2. 2.She unblanked her computer screen to show the new design.
   她擦掉电脑屏幕来展示新的设计。
3. 3. The teacher asked us to unblank the test papers before we handed them in.
   老师要求我们在交卷前把试卷擦干净。