1. As children age, they begin to adolesce and go through various physical and emotional changes.
随着孩子们的年龄增长，他们开始进入青春期，经历各种身体和情绪上的变化。

2. The young girl is starting to adolesce and is experiencing a growth spurt.
这个年轻女孩开始进入青春期，正在经历一个生长迅速的阶段。