扭秤

例句：

1. 1. The scientist used a balance to measure the weight of the objects.
   科学家使用天平来测量物体的重量。
2. 2. The teacher balanced the scales between the two sides to ensure fairness.
   老师在两边的天平上平衡了重量，以确保公平。
3. 3. The chemist balanced the scales to determine the exact composition of the solution.
   化学家通过天平来测定溶液的确切组成。