Ni ubuhe butumwa bwo kumena imirongo?Ibisobanuro birambuye kubyerekeye ihame ryakazi ryabavunagura imizunguruko Iyo ikosa ribaye muri sisitemu, kurinda ibintu byamakosa birakora kandi icyuma cyumuzunguruko cyananiwe kugenda, kurinda ibintu byamakosa bikora kumashanyarazi yegeranye ...
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