受控于我们传感器的工作或者我们对周围环境的反应，这些开关可以随时打开或关闭。
These switches turn on and off all the time, controlling how our cells work and how we respond to our environments.
供电行业远远走在了前面，主要原因是他们可以利用电网来收集传感器反馈的数据和控制伺服开关。
Power utilities are well ahead, not least because they can use the grid itself to collect sensor data and control switches.
诸如此类的复杂机器遍身是令人不解的阀门、过滤器、管道、软管、耦合器、轴承、开关、量表、仪表和传感器。
Complex machines like this are riddled with valves, filters, tubes, hoses, couplings, bearings, switches, gauges, meters and sensors.
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