ADutchartistanddesignerhascomeupwithadevicewhichhehopes...
问题详情:ADutchartistanddesignerhascomeupwithadevicewhichhehopeswillgetridofpollutantsfromBeijing'ssmogskies,creatingcleanairforthecity'smask-wearingpeople.Anelectromagneticfield(电磁场)willpullparticl...