Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
영구 운동은 물리학의 기본 법칙을 위반하는 것으로 알려져 있습니다.yeonggu undong-eun mulrihak-ui gibon beobchik-eul wibanhaneun geos-euro allyeo-jyeo issseubnida.Perpetual motion is known to violate the fundamental laws of physics.