48岁时，他仍然展现出青春和活力的形象。

At 48, he still projects an image of youth and ___vitality.

充满喜悦和活力，爱丽丝享受着周围的所有变化。

Full of joy and ___vitality, Alice enjoyed all the changes around her.

新政策为挣扎的经济注入了活力。

The new policy injected ___vitality into the struggling economy.