Ngaphakathi kwevalve yokutshixa umoya, umoya uvaliwe (utshixiwe) phakathi kwendawo yokungena nokuphumayo。I-vanes, okanye iincakuba zentsimbi, zevalvu ejikelezayo yokuvala umoya (ijikelezisa) ngexesha lokusebenza。Njengoko besenza, ipokotho zenza phakathi kwabo。Izinto ezipathwayo zingena ezipokothweni nge…
基础ngokugqithisileyo