nonstable state非稳定态
nonstable electromagnetic field非稳恒电磁场
nonstable state method非稳态法
nonstable periodic orbits非稳定周期轨道
nonstable homotopy group非稳定的同伦群
nonstable integrality theorem[数] 非稳定整性定理
one-dimensional nonstable flow一维不定常流