black spots

例句：

1. 1. The black spots on the wall were caused by a leak in the roof.
   墙上的黑点是由屋顶漏水造成的。
2. 2.The doctor found several black spots on his patient's skin.
   医生在他的病人皮肤上发现了几个黑点。
3. 3. The black spots on the table were due to the spilled coffee.
   桌子上的黑点是由于洒了咖啡造成的。