但学霸就是学霸，他们总有他们的备用照明计划来学习。
But super scholars are super scholars. They have their own backup lighting plans to study anyway.
整个工厂需安装有足够的紧急照明系统(带有备用电池)。
Adequate emergency lighting (with a battery back-up) should be installed throughout the factory.
污水处理站供电由就近的生产接入，生产设备用电及照明采用380/220 三相四线制供电。
The power supply of wastewater treatment is connected from the nearest access. Production electricity and lighting equipment adopt 380/220 three-phase four-wire power supply.
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