Betula alba

例句：

1. 1.The forest was densely packed with Betula alba trees.
   森林里挤满了白杨树。
2. 2.Betula alba is a fast-growing tree that can be found in many parts of the world.
   白杨树是一种生长迅速的树，可以在世界上许多地方找到。
3. 3. Betula alba is used for its wood, which is strong and durable.
   白杨木因其木材坚固耐用而被使用。