Ngokuthuthukiswa kwesayensi nobuchwepheshe, izinto eziningi ezintsha zokusebenza nemikhiqizo eza emakethe. I-NDC, ihambisana nezidingo zokuthengisa, ibambisene nabachwepheshe bezokwelapha futhi yathuthukisa imishini ekhethekile ekhethekile embonini yezokwelapha. Ikakhulukazi ngesikhathi esibucayi lapho u-CO ...
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