cube spar

例句：

1. 1. The architect designed a cube spar to support the structure.
   建筑师设计了一个立方石来支撑结构。
2. 2. The builder used cube spars to reinforce the foundation of the building.
   建筑工人使用立方石来加固建筑物的基础。
3. 3. The engineer analyzed the stresses on the cube spar during the construction process.
   工程师分析了施工过程中立方石上的应力。