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。

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.

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但锻炼几乎能马上发送运动信号，这些信号会决定哪些基因开启，哪些关闭。

But exercise sets signals in motion almost instantly that determine which genes get turned on and off.

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