also perpetual-motion
The idea of ~ is the idea of something continuing to move for ever without getting energy from anything else.
N-UNCOUNT
also perpetual-motion
The idea of ~ is the idea of something continuing to move for ever without getting energy from anything else.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012