paper birch

例句：

1. 1. The paper birch tree is a symbol of strength and resilience.
   桦树是力量和韧性的象征。
2. 2. The birch bark is used in traditional medicine to treat colds and flu.
   桦树皮在传统医学中被用来治疗感冒和流感。
3. 3. The birch bark is also known for its anti-inflammatory properties.
   桦树皮也因其抗炎特性而闻名。