undewriter

例句：

1. 1. The software has an undewriter that can easily erase any errors.
   这款软件有一个可以轻易擦除任何错误的橡皮擦。
2. 2. The teacher used a undewriter to correct the student's mistakes.
   老师使用了一个橡皮擦来纠正学生的错误。
3. 3. The undewriter was used to remove the ink from the paper before it was sent out.
   在纸张被发送出去之前，使用了橡皮擦来去除墨水。