PHRASAL VERB If you switch on a light or other electrical device, you make it start working by operating a switch. 用开关开启
She emptied both their mugs and switched on the electric kettle.
她倒空了他们俩的杯子,然后打开了电水壶。
Five years ago, dairy farmer Darryl Vander Haak flipped the switch on the first electric generator in Washington State powered by manure.
VOA: standard.2010.02.23
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。
And so we can't turn the switch on in the normal way.
让我们不能像平时一样正常开关。
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