Mwina anthu ambiri amaganiza kuti nyali ndi chinthu chophweka, zikuwoneka kuti sichiyenera kusanthula mosamala ndi kufufuza, m'malo mwake, kupanga ndi kupanga nyali zoyenera ndi nyali zimafunikira chidziwitso chochuluka cha zamagetsi, zipangizo, makina, optics.Kumvetsetsa zoyambira izi kukuthandizani kuwunika ...
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