tar spot

例句：

1. 1. The painter noticed the tar spot on the wall and decided to fix it.
   画家注意到墙上的焦油斑点，决定修复它。
2. 2. The car was covered in tar spots after a long journey.
   长途旅行后，这辆车被焦油斑点覆盖了。
3. 3. The farmer had to remove the tar spot from his crops before harvest time.
   农民必须在收获前将焦油斑点从他的庄稼上清除。