这是一个不稳定系统，就像尝试平衡立在指尖上的铅笔一样。
This is an unstable system, like trying to balance a pencil on your fingertip.
如果周期中没有平衡，系统会变得不稳定。
Without this balance in the cycle, the system becomes unstable.
如果周期中没有平衡，系统会变得不稳定。
Without this balance in the cycle, the system becomesunstable.
竞争性的贬值天生是一个不稳定的系统。
KN小于5000时，系统不会出现不稳定的现象；
是系统不稳定吗？
倒立摆是非线性、不稳定的系统。
开环不稳定时滞系统是工业现场中常见的一类被控过程，这类系统控制难度高，控制精度难以保证。
Open-loop unstable system with time delay is difficult to control using routine control methods.
培训教室电源系统不稳定，期望能尽快安排专用线路提供设备供电。
Training class of power system stability, the hope can arrange special lines provide equipment supply.
这样得到的控制系统频带较窄、时滞大，还有可能出现控制系统不稳定。
Such assumptions sometimes may result in narrow frequency band, large time delay and unstable system.
合理地设置系统参数，可以有效避免不稳定的发生。
The system can be kept stable by setting system parameters reasonably.
如果一个系统内部有一个正反馈过程，系统就会不稳定甚至自行崩溃。
A system is unstable and subject to breakdown if it evolves into a positive feedback.
如果一个系统内部有一个正反馈过程，系统就会不稳定甚至自行崩溃。
A system is unstable and subject to breakdown if it evolves into a positive feedback.
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