Ngokuthuthuka kwesayensi nobuchwepheshe, izinto eziningi ezintsha ezisebenzayo kanye nemikhiqizo ziyafika emakethe. I-NDC, ihambisana nezidingo zokumaketha, ibambisene nochwepheshe bezokwelapha futhi yathuthukisa imishini ehlukahlukene ekhethekile yemboni yezokwelapha. Ikakhulukazi ngesikhathi esibucayi lapho i-CO...
Funda kabanzi 
