Maybe the secret to Lenny's youthfulness is that he inherited a diverse set of immune genes.

也许莱尼年轻的秘密在于他继承了一套多样化的免疫基因。

Especially because there was kind of this idea that true beauty or youthfulness didn't last very long.

真正的美丽或年轻不会持续很长时间。

Instead, they emphasized a certain youthfulness in her that transcended age.

相反，他们强调她身上有一种超越年龄的青春气息。

" I must say again that I heartily admire your gallantry and youthfulness" .

“我必须再说一遍，我由衷地钦佩你的勇敢和青春”。

She had a certain air of simplicity and youthfulness in her deportment.

她的举止有一种朴素和年轻的气息。

Naoko's youthfulness struck me in a new way.

直子的青春气息以新的方式打动了我。

His bushy light-brown curls, as well as his youthfulness, identified him at once with Celia's apparition.

他浓密的浅棕色卷发， 以及他的青春， 立刻把他认作是西莉亚的幻影。

He stared, he pondered, he suddenly laughed, and in that laughter found a youthfulness he had never known in his solemn youth.

他凝视，他沉思，他突然笑了，在这笑声中，他找到了他严肃的青春中从未有过的青春。

It gives us a better understanding of the larger obsession with youthfulness and its subsequent regressive behavior as a sort of reflex against the fear of death, the fear of time running out.

它让我们更好地理解了对年轻的痴迷以及随之而来的倒退行为，这是对死亡的恐惧的一种投射，对时间流逝的恐惧。

'I sincerely trust that your wife'—but observing the youthfulness of Swithin, he withdrew the word suggested by the manner of Swithin towards Lady Constantine—'I trust the young lady was not seriously cut'?

“我真诚地相信你的妻子” ——但看到斯威辛还很年轻， 他收回了斯威辛对君士坦丁夫人的态度暗示的话——“我相信这位年轻女士没有受重伤” ？