虚弱的人

例句：

1. 1. The old man is weak and needs help.
   老人虚弱，需要帮助。
2. 2. The baby is too weak to walk yet.
   婴儿太虚弱，还不能走路。
3. 3. The old tree is weak and needs pruning.
   这棵老树很虚弱，需要修剪。