youthfulness of appearance 外貌的年轻
youthfulness and energy 青春活力
maintain youthfulness 保持年轻
vitality and youthfulness 活力与青春
joyful youthfulness 快乐的青春气息
A: How do you stay so full of youthfulness?
A：你怎么保持这么充满青春活力的？
B: I exercise regularly and eat healthy foods.
B：我定期锻炼并且吃健康的食物。
1) 年轻状态
2) 精神活力
3) 外貌或性格充满朝气
4) 生命力旺盛
5) 快乐和充满希望的感觉
1. 年轻；有活力的状态
2. 表现出的朝气与生命力
noun
1. The state or quality of being young, energetic, and full of life.
Synonym: vigor, vitality