woodruff

例句：

1. 1.The old tree had a thick layer of woodruff on its trunk.
   这棵老树的树干上覆盖着厚厚的一层木屑。
2. 2.The woodruff collected in the forest was used for making soap.
   森林里收集的木屑被用来制作肥皂。
3. 3.The woodruff was so thick that it was almost impossible to get through.
   木屑太厚了，几乎不可能穿过去。