金鸡纳树

例句：

1. 1. This tree is a rare species of plant that grows in the rainforest.
   这棵树是一种稀有的植物，生长在热带雨林中。
2. 2. The tree has deep roots and can grow up to 30 meters tall.
   这棵树有深根，可以长到30米高。
3. 3. The tree's bark is a dark brown color and it produces a sweet fruit called "kumquat".
   这棵树的皮是深褐色的，它结出的果实叫做“柚子”。