youthfulness是甚么意义_youthfulness怎样读

　　youthfulness是甚么意义：n.青年，少壮；芳华；

 

　　youthfulness的例句和用法

 

　　But of course we're actually about extending or restoring physical and mental youthfulness and vitality.
　　可是，咱们固然现实上是扩大和坚持膂力的和精力的年青和活气。