很难的一句英语：UpwardsofabillionstarsinourgalaxyhaveburntUpwardsofabillionstarsinourgalaxyhaveburntuptheirinternalenergysources,andsocannolongerproducetheheatastarneedstoopposetheinwardforceofgravity

　　很难的一句英语：Upwardsofabillionstarsinourgalaxyhaveburnt

　　Upwardsofabillionstarsinourgalaxyhaveburntuptheirinternalenergysources,andsocannolongerproducetheheatastarneedstoopposetheinwardforceofgravity

　　后半句

　　andsocannolongerproducetheheatastarneedstoopposetheinwardforceofgravity

　　是什么结构,哪个是主语,谓语动词,哪个是宾语,哪些是定状补

　　用了省略或者倒装了吗