tree grammar

例句：

1. 1. The tree is tall enough to reach the sky.
   这棵树足够高，能触及天空。
2. 2. Trees are an important part of our ecosystem.
   树木是我们生态系统的重要组成部分。
3. 3.The forest was dense and full of life.
   森林郁郁葱葱，生机勃勃。