虚弱地

例句：

1. 1. The old man was weak from lack of exercise.
   老人由于缺乏锻炼而身体虚弱。
2. 2. The baby is too weak to walk yet.
   婴儿还太小，走不了路。
3. 3. Her health is weak due to poor diet.
   她的健康因不良饮食而虚弱。