树

例句：

1. 1.The tall tree in the park is a symbol of nature's beauty.
   公园里那棵高树是大自然美丽的象征。
2. 2.The forest was filled with the sound of birds singing.
   森林里充满了鸟儿的歌唱声。
3. 3.The scientist planted many trees to help reduce air pollution.
   科学家种植了许多树木以帮助减少空气污染。