weak multiplication

例句：

1. 1. The old man was weak from lack of exercise.
   老人因为缺乏锻炼而身体虚弱。
2. 2. The team's performance was weak in the crucial game.
   在关键的比赛中，球队的表现很弱。
3. 3. The child is weak and needs extra care.
   这个孩子很虚弱，需要额外的照顾。