Raws li lub unearthed kab lis kev cai relics, "diapers" tau invented txij li thaum lub sij hawm ntawm cov tib neeg primitive.Tom qab tag nrho, cov neeg thaum ub yuav tsum tau pub lawv cov menyuam mos, thiab tom qab pub mis, lawv yuav tsum daws qhov teeb meem ntawm tus menyuam cov quav.Txawm li cas los xij, cov neeg thaum ub tsis tau them nyiaj ntau rau ...
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