无人看守 meaning in English

guardless

The prisoner was left unguarded
那个犯人无人看守。
But currently unguarded
但现在无人看守
But currently unguarded
但现在无人看守
A basic principle , method and realization process that can automatic search , take and survey aims based on maximum principle of strength of distance measurement signal is introduced
摘要介绍了一种基于测距信号强度最大原理进行目标的自动搜寻、照准与测量的基本工作原理、方法与实现过程，分析了其适合于作为固定站用于无人看守的危险地区的长期变形监测。