the flick of a switchEASYused to emphasize how easy it is to start a machine and use it (只要)轻轻一按开关(就行了)〔用于强调开动和使用机器很容易〕 I can shut off all the power in the building at the flick of a switch. 只需按一下开关,我就能关闭大楼的所有电源。
at the flick of a switch• These days about 15 percent of our energy is obtained at the flick of a switch.
→ the flick of a switch at flick2(1)