felling marks

例句：

1. 1.The forest ranger marked the fallen trees with a red flag.
   森林管理员用红旗标出了倒下的树木。
2. 2. The hunter left his tracks as he made his way through the woods.
   猎人在穿过树林时留下了他的足迹。
3. 3. The carpenter carefully marked each board before cutting it into pieces.
   木匠在切割木板之前小心地做了标记。