calculated rise of arch

例句：

1. 1. Theengineer calculated the time it would take to build the bridge.
   工程师计算了建造这座桥所需的时间。
2. 2. He calculated the cost of the materials before buying them.
   他在购买材料之前计算了成本。
3. 3. She calculated her expenses carefully before going on a trip.
   她在去旅行前仔细计算了她的开销。