Betula

例句：

1. 1. Betula alba is a tree that grows in the northern hemisphere.
   白杨树是一种生长在北半球的树木。
2. 2. The white bark of the Betula alba tree is very distinctive.
   白杨树的白色树皮非常独特。
3. 3. Betula alba trees are used for their wood and bark in traditional medicine.
   白杨树因其木材和树皮在传统医学中被使用。