单词：youthfulness
n. 少壮
n the freshness and vitality characteristic of a young person
词型变化：名词复数形式 : youthfulnesses
词性分布：
youthfulness的用法和样例：
例句
用作名词(n.)
- It is the Foundation of Youthfulness.那是年轻的秘诀。
- But of course we're actually about extending or restoring physical and mental youthfulness and vitality.但是，我们当然实际上是扩展和保持体力的和精神的年轻和活力。
词汇搭配
- youthful年轻的
【近义词】
- youth青年时期
- adolescence青春期（一般指13～16...
- juvenility年轻