![protostellar造句怎麼寫]( "protostellar造句怎麼寫")
- Alargecloudofgasanddustbeginstocongealgravitationally,startsrotating,andeventuallyflattensintoanobjectcalledaprotostellardisk.Theabsenceofprotostellarcloudmaterialandthelowvelocityofthestarsshowstheycouldnothavebeenbornrelativelyrecentlyorsailedinfro...
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