brood cavity

例句：

1. 1.The bird's nest is located in a tree.
   鸟巢位于一棵树上。
2. 2. The eggs are laid in the nest cavity.
   蛋被放在产卵室中。
3. 3. The nest cavity is small but provides enough space for the chicks to grow.
   产卵室虽小，但足够让雏鸟成长。