unstable area meaning in English

不稳定区

In order to keep away from the unstable area and maintenance the system stability in wide output range , how to design the two - stage circuit parameters is a question for discussion
如何设计前后级的电路参数，保证宽范围输出电压条件下系统的稳定工作?本文对此问题进行了研究分析。
In the wake of the sept . 11 attacks , the pentagon is preparing to reduce the size of u . s . bases abroad while increasing their number and positioning them in more remote and unstable areas of the world
在911袭击事件发生以后，五角大楼在增加海外基地数量的同时却在准备着缩减这些基地的规模并把它们安置到世界上更加偏远动荡的地区。