- 问题详情:ACoolWaytoKeepCool Weallknowthatfoodswilleasilygobadiftheygettoowarm.Soweusuallyputthemintoourfridgestokeepcoolinhotweather.Butcanyoumakeitwithoutfridges? In1995,Abba,ateacherfromNigeria,foundacoolway.HisinventionwascalledPot-in-PotCool...
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