WhenIwasachildIhadam的知识精选

WhenIwasachildIhadamodelrailwayset.AsIdrovemytrainaroun...
问题详情:WhenIwasachildIhadamodelrailwayset.AsIdrovemytrainaroundthetrackIsetmyself 21 goals:“Keepthetrainataconstantspeed”and“letittravelas 22  asIcan”.Thiswasfunandexciting.Finally,Iwas 23...
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