Such tasks include opening and closing the garage door, starting the engine, and stopping at traffic lights, in addition to putting oil and gas in the car and performing periodic maintenance.

这些任务包括打开和关闭车门、开动引擎、在红绿灯面前停车，为车加油及进行定期的养护。

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One evening, while working late, Fred was startled when the lights went out. He realized a maintenance man must have shut them off, unaware that anyone else was in the building.

一天晚上他工作到很晚，当灯息灭时，福瑞德很吃惊，他知道一定是维护人员不知道大楼里还有人就把灯关了。

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Our company is mainly engaged in such projects as following: manufacture, installation, maintenance and reparation of various types of large and medium sized neon lights and light box advertisements;

公司主要经营制作项目有：承接各类大中型霓虹灯及灯箱广告制作安装和维修保养；

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The other 144 is utterly essential to keep lights on when unexpected demand arises from heat waves, outages or maintenance downtime.

FORBES: Brownout

The batteries are not essential during flight as they are mainly used on the ground during maintenance activity, Sinnett said, such as providing navigation lights and braking while the airplane is towed.

CNN: Boeing announces changes to Dreamliner battery system

The lights will be more visible to drivers in sunny conditions and require less maintenance so they are cheaper to run.

BBC: Cumbria traffic light improvements begin