轻而弱者

例句：

1. 1. The old man is a light and weak figure in the crowd.
   老人是人群中一个瘦弱的身影。
2. 2. He was always weak and unable to lift his heavy suitcase.
   他总是虚弱的，无法举起他的沉重的手提箱。
3. 3. The child was too weak to walk by himself.
   孩子太虚弱了，不能自己走路。