weak liquor

例句：

1. 1. The old man is weak and needs help.
   老人虚弱，需要帮助。
2. 2. The team's performance was weak in the crucial match.
   球队在关键比赛中表现不佳。
3. 3. He felt weak after running for a long time.
   他跑了很长时间后感到虚弱。