weak shock

例句：

1. 1. The old man is 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.
   这个婴儿还走不了路，太弱了。
3. 3. The team was weak in defense, allowing the opponent to score easily.
   球队在防守上表现不佳，让对手轻易得分。