回春剂

例句：

1. 1.The traditional Chinese medicine has been used for centuries to promote youthfulness.
   这种传统中药被用来促进青春。
2. 2. She believes that taking this herbal remedy can help her achieve a longer lifespan.
   她相信服用这种草药可以延长寿命。
3. 3. The ancient Chinese wisdom of "Yuan Chun" (回春) is still studied today as a way to maintain good health and vitality.
   “返春”的古老中国智慧至今仍然被研究，作为一种保持健康和活力的方式。