rejuvenation theory

例句：

1. 1. The elderly need to maintain their physical and mental health through regular exercise and healthy diets.
   老年人需要通过定期锻炼和健康饮食来维护他们的身体健康。
2. 2.The company's new product line has been designed to rejuvenate the market with its innovative features.
   该公司的新产品线设计旨在以其创新特性重新激发市场活力。
3. 3. The research on rejuvenation therapy is still in its early stages, but it holds great promise for future development.
   关于再生疗法的研究仍处于初级阶段，但前景十分广阔。