Based on the critical condition of instability, an equation of system stress dropping is deduced.
根据系统失稳临界条件，导出系统应力跌落量的表达式。
The sufficient and necessary condition of instability is deduced, which is the theoretical base of the cavern's stability controlling…
为溶腔稳定性控制和溶腔用于战略石油和天然气的储备打下理论基础。
The upper-level jet created the dynamic instability condition and the low-level jet played the vapour provider of the snowstorm and the trigger of convective instability energy release.
高空急流提供动力不稳定条件，低空急流是暴雪区水汽的提供者和对流不稳定能量释放的触发者；
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