halver

例句：

1. 1. The soup has been halved since the ingredients were added.
   自从添加了食材，汤已经减半了。
2. 2.The weight of the balloon was halved by adding more air.
   通过加入更多空气，气球的重量减半了。
3. 3.The strength of the rope has been halved due to the moisture in the rain.
   由于雨水中的湿度，绳子的强度减半了。