youth·ful·ness
noun/ˈjuːθflnəs/
/ˈjuːθflnəs/
[uncountable]- the fact of being young
年轻：年轻 - the youthfulness of much of the population in nearly all these countries
几乎所有这些国家的大部分人口都年轻
- the youthfulness of much of the population in nearly all these countries
- the quality of looking or acting like somebody who is young or younger than they actually are
年轻：看起来或表现得比实际年龄年轻或年轻的人的素质 - She graces the stage with elegance and youthfulness.
她以优雅和青春的姿态为舞台增光添彩。
- She graces the stage with elegance and youthfulness.