Ubwa mbere, ni uruhe ruhare rwimyitozo ngororamubiri ifite inda nzima 1, imyitozo yumubiri wose irashobora gukora imyitozo kumubiri wose, cyane cyane imyitozo yinda, ukuboko, urutugu, ukuguru kwi munsi, irashobora gukoreshwa muguhindura imiterere nuburemere, ifite a ingaruka nziza zo kugabanya ibiro. 、 2, ...
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