The rocket gives the car plenty of power, but it is either on or off.
火箭发动机给汽车提供大量的动力，但是操作它只是开或关。
Shut off power before working and servicing on electrical equipment or circuits.
在维修保养电器设备之前，必须先切断电源。
Shut off power before working and servicing on electrical equipment or circuits.
在维修保养电器设备之前，必须先切断电源。
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