unsteady problem

• 不稳定问题

unsteady problem的用法和样例：

例句

1. So, the stability is the key problem on the structural design of latticed domes.
   网壳结构的稳定问题也因此成为设计中的关键问题。
2. Investigated was the aerodynamic instability problem of an axial-flow compressor during throttling tests.
   研究了某轴流式压气机节流试验中的气动不稳定问题。