weak image

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，不能走路。
3. 3. His health has been weak since he fell ill.
   自从他生病以来，他的健康状况一直很弱。