Then at night, the fiber optics work in reverse, lighting up the towers from the inside and with power provided by integrated solar-charged battery packs.
在晚上，光纤反向工作，用集成太阳能充电电池从内部为塔楼照明。
2
The existing sensors have to be connected to a power source to take readings and transmit them over cell phone towers.
现有的传感器必须接上电源才能读取信息并将它们通过手机发射塔发射出去。
3
Cooling towers have come to symbolize power plants - nuclear or not - around the world.