number of cylinders

例句：

1. 1. The engineer calculated the number of cylinders needed for the project.
   工程师计算了项目所需的圆柱数量。
2. 2. The construction crew assembled the number of cylinders required for the building's foundation.
   建筑工人组装了建造大楼地基所需的圆柱数量。
3. 3. The manufacturer produced a large number of cylinders for the factory's production line.
   制造商为工厂生产线生产了大量圆柱。