The switch to turn on the light is called education.

打开这束光的开关就是教育。

youdao

By increasing or lessening the hours of darkness in each day, the scientists have been able to turn plant growth off and on like an electric switch.

用增加和减少每天黑暗小时数的方法，科学家已经能够控制植物生长，如同控制一个电器开关。

youdao

The stop/start-enginenotifications could switch the engine off and on automatically, or they couldtrigger alerts to the driver to turn it off/on manually.

这种引擎开/关通知可以自动地在开启与关闭之间切换，或者该系统也可以给司机发送“戒备信号”让司机自己动手开启或关闭汽车引擎。

youdao

Of course, to turn the on-off switch on is harder when somebody's in a coma.

当然要开启这个开关难度更大,当人陷入昏迷。

耶鲁公开课 - 死亡课程节选

Imagine I have a little lamp, a little goose- one of those little gooseneck lamps, I'd put it on the table here, I'd put the height about a f-- about a foot off the table. And if I was really good, - I could hit, or time it so that when I hurt- yeah, try again. When I turn this on switch on in the lamp, at exactly the same time, I'm going to hit a key on my computer and start it running.

想象下我有一个那种小雁颈台灯-,我把它放在桌子上，大概离桌子，有一英尺那么高吧,这样挺好的，我可以打开-,或者关闭这灯,并在这同时，我可以让我电脑,开始运行。

麻省理工公开课 - 计算机科学及编程导论课程节选

By using a controller device called the WACI NX you could turn on the TV, turn on the XBOX, switch to the correct input on the TV, and send the PLAY command to XBMC all in 1 button press on your PSP.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

"You...start almost immediately to turn the switch on from a shorter-term tactical focus to a longer-term strategic focus, " he says.

WSJ: Elite Advanced Management Programs - Nondegree Courses for Experienced Executives - WSJ.com

It's refreshingly easy to use: just raise the flash head to switch on... then turn off again by lowering when the flash isn't needed.

ENGADGET: Sony NEX-3N and Alpha A58 unveiled, heading to Europe this spring