excystment

例句：

1. 2.
   使
2. 3.
   使
3. 1. The chickens were incubating eggs in the warm nest.
   鸡们在温暖的巢里孵化鸡蛋。
4. 2.The scientists are hatching a new theory about the origin of life.
   科学家们正在孵化关于生命起源的新理论。
5. 3. The caterpillar was developing into a butterfly.
   毛毛虫正在发育成蝴蝶。