period of development

• 发育期

period of development的用法和样例：

例句

1. The boy's voice is beginning to crack at the age of puberty.
   这男孩子的嗓音在发育期开始变得粗声粗气。
2. And, the babyhood and the youth development period, are two growth peaks.
   其中，婴儿期和青春发育期，是两个生长高峰。