Namhlanje, ndiza kukubonisa imfuneko yokuthambisa isayensi edumileyo.Uzigcina njani izixhobo zokuthambisa.I-Friction kunye nokugqoka yenye yeendlela ezintathu eziphambili zomonakalo kwiindawo zoomatshini;sesona sizathu siphambili sokunciphisa ukusebenza kakuhle, ukuchaneka kunye nokuchithwa kwe-ma...
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