cottonwood

例句：

1. 1.The cottonwood tree is tall and sturdy, with a long lifespan.
   这种杨树高大而结实，寿命长。
2. 2. The cottonwood trees are a symbol of strength and resilience in the region.
   这些杨树是该地区力量和韧性的象征。
3. 3. The cottonwood forest is a popular destination for birdwatchers during the spring migration.
   春季迁徙期间，棉杨林是观鸟爱好者的热门目的地。