Ukukhanya kunoluhlu olubanzi lweziphumo kwimpilo yokubonwa komntu, izingqisho zebhayoloji, ukuqonda ngokweemvakalelo, imetabolism kunye nokungakhuseleki ngokubonakalayo kunye neziphumo ezingabonakaliyo zebhayoloji, kwaye bubuchwephesha obuphambili kwimpilo yendawo yokuhlala yabantu kunye nokujoliswa okufanayo kwimida yoyilo lwezakhiwo, optics, ubomi sc...
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