Ned turned on the lanterns, which worked with batteries.内德打开开关亮起了装电池的灯笼。He took his flashlight from his jacket pocket and switched it on.他从夹克口袋里拿出手电筒，打开开关。I forgot to turn it on. D'oh!我忘了打开开关了，咄！I plugged in the kettle and switched it on.我把水壶插上电，然后打开开关。