young in heart

例句：

1. 1. She has a youngin heart and is always eager to learnnew things.
   她年轻有为，总是渴望学习新事物。
2. 2. The young in heartoften dreams of great achievements.
   年轻人怀揣着伟大的梦想。
3. 3. He was young inheart but wise beyond his years.
   他年轻时充满激情，但比同龄人更成熟。