Thousandsofyearsago,itwascommontoseemanystarsinthesk...
問題詳情: Thousandsofyearsago,itwascommontoseemanystarsinthesky.However,thischangedwiththe61(invent)ofelectricity.Citieshavegone62(bright),usingmorelights.Andthatmeansmostpeopleinurbanareaswillnev...