tree crown

例句：

1. 1. Thetall tree has a beautiful tree crown.
   这棵高大的树有一个美丽的树冠。
2. 2.The tree crown is covered in green leaves.
   树冠上覆盖着绿色的叶子。
3. 3. Thetree crown is where birds rest and buildtheir nests.
   树冠是鸟儿休息和筑巢的地方。