bark of eucommia

例句：

1. 1. The dog barked at the stranger as he approached the house.
   当陌生人走近房子时，狗叫了起来。
2. 2. The tree's bark is rough and hard to the touch.
   这棵树的树皮粗糙且难以触摸。
3. 3. The bark of the dog was thick and scratchy.
   那只狗的皮毛又厚又粗糙。