column with constant cross sections

例句：

1. 1. The column of light cast a warm glow over the room.
   那束光柱在房间里投下了温暖的光辉。
2. 2. The column of books on the shelf is too high for me to reach.
   书架上的书柱太高，我够不着。
3. 3. The tall column of smoke rose up from the burning building.
   从燃烧的大楼冒出了高高的烟柱。