lumpsucker

例句：

1. 1. The teacher useda lumpsucker to clean theblackboard.
   老师用橡皮擦清理黑板。
2. 2.The student tried to use a lumpsucker to correct his mistakes.
   学生试图用橡皮擦纠正他的错误。
3. 3. The lumpsucker was the only tool availablefor erasing the ink on thepaper.
   橡皮擦是可用的唯一工具，用来擦掉纸上的墨水。