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學習快評丨qibao666888　　“薄??(bo)如??(ru)蟬??(chan)翼?(yi)”的??(de)土??(tu)星??(xing)環(huán)??(huan)是??(shi)由??(you)什??(shen)么??(me)組??(zu)成??(cheng)的??(de)？?　　北??(bei)京??(jing)天??(tian)文??(wen)館?(guan)的??(de)科??(ke)普??(pu)專??(zhuan)家??(jia)介??(jie)紹?(shao)??，看??(kan)上??(shang)去??(qu)美??(mei)麗??(li)的??(de)土?(tu)星??(xing)光??(guang)環(huán)??(huan)??，實?(shi)際??(ji)上??(shang)是??(shi)由??(you)無??(wu)數(shù)??(shu)水??(shui)冰??(bing)顆??(ke)粒??(li)、巖??(yan)石??(shi)碎??(sui)片??(pian)和??(he)塵??(chen)埃??(ai)構(gòu)??(gou)成?(cheng)??，規(guī)??(gui)模??(mo)超??(chao)級秘(ji)龐??(pang)大??(da)??，但??(dan)是?(shi)厚??(hou)度??(du)有??(you)的??(de)地??(di)方??(fang)是??(shi)摩??(mo)天??(tian)大??(da)樓??(lou)??，有??(you)的??(de)地??(di)方??(fang)卻??(que)只??(zhi)有??(you)平??(ping)房??(fang)那??(na)么??(me)高??(gao)??，平??(ping)均??(jun)下??(xia)來??(lai)也??(ye)就??(jiu)十??(shi)多?(duo)米??(mi)??。??。