pine-soot

例句：

1. 1. The forest fire has left a lot of pine-soot on the ground.
   森林火灾留下了大量的松脂烟在地上。
2. 2. The workers were covered in pine-soot from their work in the forest.
   工人们因为森林工作而全身都是松脂烟。
3. 3.The pine-soot was so thick that it blocked the sunlight and made the area look dark.
   松脂烟太厚了，以至于挡住了阳光，让这片地方看起来非常黑暗。