youthfulness

基本解释

One of the most striking things about the quantum revolutionaries was their youthfulness.
这些量子革命者最引人瞩目的情况之一就是他们风华正茂。
huzhangao.blog.163.com
Do you wake up every morning full of vim and vigour, ready to tackle the day with all of your energy, youthfulness and vitality? No?
你是否每天早上都神采奕奕，准备用你全部的能量来迎接一天的挑战，感觉年轻又有活力？或许不是？
By selecting the right color scheme, you can create an ambiance of elegance, warmth or tranquility, or you can convey an image of playful youthfulness.
选择对的色彩搭配，可以营造一种高雅、温馨和宁静的氛围，又或者打造出青春活泼的景象。

His outlook on life was youthful, and he kept that youthfulness alive throughout his life, even during his suffering.
NPR: Johnny Griffin: In Memoriam
Snapping off his clean white teeth, his voice had a gee-whiz youthfulness until, catching hold, it shifted to take on the hardscrabble surroundings.
NEWYORKER: The Tree Line, Kansas, 1934
Being hairless has become identified with the idealization of youthfulness, explains Professor Susan A. Basow, head of the psychology department at Lafayette College in Easton, Pa.
FORBES: Zapped!