体质弱的

例句：

1. 1. The old man is weak and needs to rest more often.
   老人身体虚弱，需要更频繁地休息。
2. 2. The baby is too weak to walk yet.
   这个婴儿还太弱，不能走路。
3. 3. The team's performance was weak in the crucial game.
   在关键的比赛中，球队的表现很弱。