English version

the flick of a switch

From Longman Dictionary of Contemporary Englishthe flick of a switchthe flick of a switchEASYused to emphasize how easy it is to start a machine and use it I can shut off all the power in the building at the flick of a switch. flick
Examples from the Corpus
at the flick of a switchThese days about 15 percent of our energy is obtained at the flick of a switch.
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