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אין תוצאות חיפוש עבור: results/For_200_million_years__the_proportions_of_different_gases_in_the_atmosphere_have_been_much_the_same_as_they_are_today:_−_about_four-fifths_(80_)_nitrogen_−_about_one-fifth_(20_)_oxygen_−_small_proportions_of_various_other_gases.,3,0,7033;12264;12343,0,30,1,tn,1.html