barkhausen

例句：

1. 1.The tree's bark is rough and dry.
   这棵树的树皮粗糙且干燥。
2. 2.The bark of the oak tree is thick and hard.
   橡树的树皮厚且硬。
3. 3. The bark was stripped off by the winter winds.
   冬天的风剥去了树皮。