postmolt

例句：

1. 1.The bird was undergoing its postmolt period.
   这只鸟正在经历换羽期。
2. 2.During the postmolt period, birds are vulnerable to predators.
   在换羽期，鸟类易受捕食者攻击。
3. 3.The postmolt period is a critical time for birds to rebuild their feathers.
   换羽期是鸟类重建羽毛的关键时期。