rubout

例句：

1. 1. He rubbed out the scratches on his arm with a cloth.
   他用布擦掉了手臂上的划痕。
2. 2.The teacher rubbed out the wrong answers and asked the students to answer correctly.
   老师擦除了错误的回答，并要求学生们正确作答。
3. 3. After the meeting, the chairman rubbed out all the notes and started a new agenda.
   会议结束后，主席擦除了所有的笔记，并开始了新的议程。