mains jack

例句：

1. 1. The mains jack is located in the wall behind the TV.
   主电源插座位于电视背后的墙上。
2. 2.We need to turn off the mains jack before we start working on the project.
   在我们开始这个项目之前，我们需要关闭主电源插座。
3. 3. The mains jack was damaged during the storm and needs to be replaced.
   主电源插座在暴风雨中受损，需要更换。