two-way joist

例句：

1. 1. The two-way joist is the main support for the roof.
   双向梁是屋顶的主要支撑。
2. 2. The engineer designed the two-way joist to distribute the load evenly.
   工程师设计了双向梁来均匀分布负载。
3. 3.The two-way joist is a crucial component in the construction of tall buildings.
   双向梁是高层建筑施工中至关重要的组成部分。