feed mark

例句：

1. 1. The farmer marked the spot with a red feed marker before planting.
   农民在种植前用红色饲料标记标记了地点。
2. 2. The dog's nose was marking his territory with the scent of fresh grass.
   狗的鼻子用新鲜的草味标记了他的领地。
3. 3. The scientist used a special marker to indicate the location of the new discovery.
   科学家用一种特殊的标记来指示新发现的位置。