dull corrugated roll

例句：

1. 1. The paint on the wall is dull and peeling.
   墙上的油漆很暗淡，有剥落。
2. 2. The old car was dull and rusty.
   那辆旧车又旧又生锈。
3. 3. The book was dull and boring.
   这本书又旧又无聊。