相关Astronomy5的英语章节
> 列表每日星相:Daily Astronomy(5)
2017-08-27Sometimesit'snightonthegroundbutdayintheair.AstheEarthrotatestoeclipsetheSun,sunsetrisesupfromtheground.Therefore,atsunsetontheground,sunlightstillshinesoncloudsabove.Underusualcircumstances,aprettys......