Different from vessels under internal pressure loading, vacuum vessels usually fail with the instability which is very sensitive to the geometrical defects.

与承受内压的容器不同，真空容器往往发生的是稳定性破坏，而且对自身的几何缺陷非常敏感。

youdao

The film stability curve decreased first and then went stabilized, reflecting the instability of film structure in Daqing vacuum residue fractions.

膜稳定性曲线先下降然后趋于稳定，反映出大庆减渣馏分膜结构中存在不稳定结构。

youdao

If the calculation on vacuum instability stands up, it will revive an old idea that the Big Bang Universe we observe today is just the latest version in a permanent cycle of events.

BBC: Cosmos may be 'inherently unstable'

We're trying to change round decades, indeed centuries of conflict so what we do know is that where there is a political vacuum, where there is instability in the democratic institutions then the men of violence will try to wreck this peace process.

BBC: News | BREAKFAST WITH FROST | Dr John Reid MP, Secretary for Northern Ireland