one hand

例句：

1. 1. She held the ball with one hand while she danced.
   她一边跳舞一边用一只手拿着球。
2. 2.He used his one hand to lift the heavy box.
   他用一只手提起了沉重的箱子。
3. 3.One hand is better than two hands when it comes to solving problems.
   在解决问题上，一只手比两只手好。