nested scope

例句：

1. 1.The tree is nested within the forest.
   这棵树位于森林内部。
2. 2. She nested her books in the corner of the desk.
   她把书放在桌子角落。
3. 3. The nested eggs are ready to hatch.
   这些内嵌的蛋已经准备好孵化了。