Ngokuqhelekileyo isetyenziselwa ukuvelisa okanye uphando lwezesayensi, igumbi elicocekileyo yindawo elawulwayo enezinga eliphantsi lezinto ezingcolisayo ezifana nothuli, i-microbes emoyeni, i-aerosol particles, kunye nomphunga wamachiza. Ukunyanisa, igumbi elicocekileyo line ...
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