Using the comparion theorem of difference equation, persistence theorem of discrete semi-dynamical system and stability of monotonous operator, we gain the boundary, uniform persistence and permanence of the system.
应用差分方程的比较原理 ,离散半动力系统的持久性定理以及单调算子的三分稳定性 ,获得系统的有界性 ,一致持久性 ,永久持久性 。
Using the theorem on discrete semi-dynamicl system and the stability results on monotonous and continuous operator,we obtained the sufficent conditions for uniform boundness,strong and weak persistence and permanence of a discrete system with age-structure subdivided into young and adult population approximately.
应用差分方程的比较原理、离散半动力系统的持久性定理和单调连续算子的三分稳定性获得了一类捕食者具有年龄结构 ,即将捕食者近似地分为幼年和成年种群的离散捕食系统一致有界、弱持久、强持久和永久持久的一组充分条件 。
permanent failure
永久性故障（持续性故障）
semipermanent floating oil boom
半永久性的浮动栏油栅
semipermanent electronic storage
半永久性电子式存储器
branch long-lived assets
分支机构永久性资产
His work is ephemeral.
他的作品没有永久性。
are disappearing forever.
即将永久性地消失。
a molecule that is a permanent dipole.
是永久性偶极子的分子。
nonvolatile memory [ storage ]
固定[永久性]存储器
non-perpetual licence [taxi]
非永久性质的牌照〔的士〕
existing permanent unprotected file
现有永久性非保护文件
the Permanent Normal Trade Relations)
永久性正常贸易关系
Intellectual life is a long-term thing.
精神生活是永久性的。
establishing permanent residence
确立永久性居民身分
permanent absorbing phase strip
永久性吸收相位条带
permanent reinforced fill structure
永久性加固填筑结构
Hong Kong Permanent Identity Card
香港永久性居民身分证
No physical permanence, but only an ideal one, is necessary.
需要的不是有形的永久性，而只是理想的永久性。
Injured workers who are permanently disabled-- those who have a permanent labor market handicap-- are entitled to receive permanent disability benefits.
永久性残疾的工人－些有永久性劳务市场缺陷的人－以得到永久性残疾补偿。