You can't make a machine work without power supply.
没有动力，机器就不能转动。
Work without external power, energy saving.
工作时不需外界动力，节省能源。
It is a good machine that can work without power.
无论怎样好的机器都需要动力才能工作。
You can 't make a machine work without power supply.
没有动力，机器就不能转动。
You can 't make a machine work without power supply.
没有动力，机器就不能转动。
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