Uyini Umthetho Wendawo Yonke Yokudonsela phansi?
Umthetho wokudonsela phansi kwendawo yonke noma umthetho nje wamandla adonsela phansi, ungomunye wemithetho eyisisekelo ye-physics ye...
Umthetho wokudonsela phansi kwendawo yonke noma umthetho nje wamandla adonsela phansi, ungomunye wemithetho eyisisekelo ye-physics ye...