以下是几个有关“保持活力”的英文句子，供您参考：
1. Keep doing exercise regularly to maintain your energy and vitality.（定期锻炼可以保持你的精力和活力。）
2. Eat a balanced diet and get enough sleep to stay energized and lively.（平衡饮食，充足睡眠可以保持你的精力和活力。）
3. Don't let stress drain your energy; find ways to manage it to stay vibrant.（不要让压力耗尽你的能量；找到管理压力的方法以保持活力。）
4. Engage in activities you enjoy to keep your mind and body active and energetic.（参加你喜欢的活动，让你的身心保持活跃和充满活力。）
5. Connect with others and maintain good relationships to keep yourself energized and happy.（与他人建立联系并保持良好的人际关系，可以让你保持充满能量和快乐。）
keep energetic
energetic [,enə'dʒetɪk]
adj. 精力充沛的；积极的；有力的
Hope is itself a species of happiness, and, perhaps, the chief happiness which this world affords
