Ukwenza amakhandlela kuwubuciko nesayensi, okudinga ukunemba, isineke, namathuluzi alungile. Phakathi kwala mathuluzi, i-thermometer ibalulekile. Ukuqinisekisa ukuthi i-wax yakho ifinyelela izinga lokushisa elifanele ngezigaba ezahlukahlukene kubalulekile ekukhiqizeni amakhandlela ekhwalithi ephezulu anokwakheka okuhle, ukubonakala...
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