Making energy like the sun does might too cheap to meter or as uneconomical as a perpetual motion machine.
像太阳一样产生能量可能会太便宜以至于无法计费，或是像永动机一样太不合算。
2
He is adamant that this is not a perpetual motion machine, and does not violate the law of conservation of momentum because different reference frames apply to the drive and the waves within it.
他坚持认为这并非永动机，也没有违反能量守恒定律，因为驱动器和里面的微波使用不同的坐标系。
3
That would that would give rise to a perpetual motion machine, breaking of the second law. It can't happen.