beam instability

例句：

1. 1. The beaminstability of the bridge is amajor concern for maintenance.
   桥梁的梁失稳是维护的主要担忧。
2. 2. Thebeam instability causedby the earthquake was a significantfactor in the disaster.
   地震引起的梁失稳是这场灾难的一个主要因素。
3. 3.The beam instability can lead tostructural failure if not addressed promptly.
   如果不迅速解决，梁失稳可能导致结构失败。