process of molting

例句：

1. 1. The bird is molting its feathers as it prepares for flight.
   这只鸟正在换毛，为飞行做准备。
2. 2. The baby squirrel is molting its fur and growing new ones.
   这只小松鼠正在换毛，长出新的毛发。
3. 3.The lion is molting its thick mane to shed the old skin and reveal a new coat.
   狮子正在换毛，以脱掉旧皮并露出新皮。