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coal的精选知识

Save half of the coal
Asmarthousewifewastoldthattherewasakindofstovewhichwouldonlyconsumehalfofthecoalshewasburning.Shewasveryexcited,andsaid:"That'llbeterrific!Sinceonestovecansavehalfofthecoal,ifIbuytwo,nocoalwillbeneeded!"一位精明的.家庭主妇听人说有一种炉子用起来可...
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