prestressed

例句：

1. 1. The beam is prestressed to support the weight of the roof.
   这个梁被预应力支撑屋顶的重量。
2. 2. The concrete beam is prestressed to resist the load.
   混凝土梁被预应力以抵抗载荷。
3. 3. The steel cables are prestressed to hold the structure together.
   钢缆被预应力以保持结构在一起。