unattended repeater with ground temperature compensation and powerpassing

例句：

1. 1. The unattended repeater is a device that automatically detects and responds to changes in the environment.
   这个无人值守的重复器是一种自动检测并响应环境变化的设备。
2. 2.The unattended repeater is used in remote areas where there is no power supply.
   这个无人值守的重复器用于没有电源供应的偏远地区。
3. 3.The unattended repeater is an essential tool for monitoring and controlling the environment.
   这个无人值守的重复器是监测和控制环境的重要工具。