Theroverfirsthadtoundergoinextensivecheckoutperiod, a kindofbootinguponMars.
探測器首先要經歷廣泛的檢查期,也就是在火星上的一種啟動。
Ithadunfoldeddownloadsoftware.
它已經展開了下載軟件。
It's gottodeploy a $23 milliondronehelicopterwhosepurposeistofindoutifpoweredchopperflightispossibleonMars, andbeforeanyofthatcouldhappen, perseverancehadtomake a safelandingontheRedPlanet a previewof a perilousdescentontheRedPlanetAftermonthstravelingthroughspace, it's whatNASAdescribesassevenminutesofterrorthemeUSspaceagencies.
Itdeploys a parachute, andatjusttherightmoment, itreleasesofroverretrorocketingtowards a treacherousterrainThatallhastohappeninaboutsevenminutes, anditallhastohappenautonomously.