E-United States, ucwaningo olusha oluvela e-Portland State University (PSU) luphethe ngokuthi ugwayi ...
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UCWANINGO: Ugwayi we-elekthronikhi ukhiqiza okungenani amakhemikhali ayi-15.
UCWANINGO: Ugwayi we-elekthronikhi ukhiqiza okungenani amakhemikhali ayi-15.
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UGABA: Ukubhema iphakethe ngosuku kubangela isilinganiso sezinguquko eziyi-150 ngonyaka.
UGABA: Ukubhema iphakethe ngosuku kubangela isilinganiso sezinguquko eziyi-150 ngonyaka.