ThefirstimportantexpositionintheUnitedStateswasheldinPhiladelphiain1876.
A、exhibitionIn 1974 Henry Aaron broke Babe Ruth's monumental lifetime record of 714 home runs.
TheNativeAmericaninterpreterSacajaweawasavaluablememberoftheLewisanddarkexpeditionin1805.
The wheels of the first road vehicles were fashioned from crude stone disks.
Somecosmeticsmanufacturersattempttocapturetherose'sunmistakablefragrance香味insoapsandperfumes.
Despitetheproliferationofotherfastermodesoftransportation,therailroadsremainthelargestcarriersofintercityfreightintheUnitedStates.
