brown off

例句：

1. 1. The old wooden table has been browning off for years.
   这把旧木桌已经变得暗淡无光了好几年。
2. 2. The paint on the wall is starting to brown off.
   墙上的油漆开始褪色了。
3. 3. The dish was stained by the sauce, making it look brown off.
   这道菜被酱汁染黑了，看起来失去了原有的颜色。