- 問題詳情:Howdopeoplefindtheirways?Atfirst,peoplediditbylookingatthesun,themoonandstars.Later,westartedtousethecompass(指南針).Today,therearenavigationsatellitesystems.Anavigationsatellitesystemusesgroupsofsatellites.Theysendinformationtoareceiver,suchas...
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