- 问题详情:ScientistsinMexicohavejustbegunanewstudyofoneoftheworld’sbiggestpyramids:thePyramidoftheSun,northofMexicoCity.They’reputtinglotsofsmall,high-techmachinesunderthepyramidtotrytounlocksomeofitssecrets.Forthousandsofyears,peoplehavetriedtouncov...
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