yellow stain

例句：

1. 1.The old painting had a yellow stain onthe wall.
   这幅旧画的墙上有一块黄色污点。
2. 2. The book has ayellow stain on the cover.
   这本书封面上有一块黄色污点。
3. 3. The stain on thetable was caused by spilled coffee.
   桌子上的污点是由咖啡洒出来的。