on-off switch

常见例句

instead, it functions as the gene's on-off switch.
相反，它起着基因启动-关闭开关的功能。
Scientists have developed an on-off switch in memory.
科学家已研制出一种记忆开关。
The device (a prototype is about the size of a deck of cards) connects to your TV and cable box, with an on-off switch for volume leveling.
这个设备(尺寸相当于一副扑克牌大小)将你的电视和有线电视盒相连，并且带有一个开关来控制调节音量。
srschina.blog.163.com

So now it's not just that the on-off switch is stuck in off, the brain's no longer capable of engaging in these higher order P-functions.
所以现在看来就不是开关被卡住，大脑已经不再有能力,实行这些高级的人格功能。
耶鲁公开课 - 死亡课程节选
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
The cognitive structures are still there, but the on-off switch is switched to off.
认知结构仍然存在，只是开关还没有被开启。
耶鲁公开课 - 死亡课程节选

They seem only to care about where the on-off switch is located.
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All these mutations were done by physically changing the animals' DNA. It wasn't until Johns Hopkins' Beachy and his colleagues remembered reading about the Idaho lambs that they realized cyclopamine could be used as an easier on-off switch for the hedgehog pathway.
FORBES: Magazine Article
If it all sounds too much, Mrs Kramlich points out that living with media art is really no different from living with fixed-image art. (The couple have works by Andy Warhol and Joseph Beuys in their mock-Tudor San Francisco home.) The difference, she adds with an eye to California's electricity troubles, is that you have an on-off switch—and when the images vanish, the house is an artwork of its own.
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