unipole

例句：

1. 1. The unipole is the only source of power in this region.
   这个地区的唯一的电源是单极体。
2. 2. The unipole was responsible for generating the electricity in the area.
   单极体负责在这个地区产生电力。
3. 3. The unipole has been used to transmit signals over long distances.
   单极体被用来在长距离上传输信号。