活力论

例句：

1. 1. The new plant is full of vitality and can grow quickly.
   这个新植物充满活力，生长迅速。
2. 2. The old man's vitality seemed to be slowly fading away.
   那位老人的生命力似乎正在慢慢消失。
3. 3. The team's vitality was evident in their performance on the field.
   团队的活力在比赛中表现得很明显。