The word Brazil in the text obviously includes the whole flat country to the east of the Andes, Guiana, Brazil, Paraguay, Buenos Ayres, and Patagonia.
This city stands likewise in a flat country, which produces much wine.
After a little rest and a breakfast at a sort of roadhouse, a relay of horses was taken, and we travelled one more day over a flat country, to the end of the stage-route.
The Gila Valley in December was quite a different thing from the Mojave desert in September; and although there was not much to see, in that low, flat country, yet we three were joyous and happy.
We were now down in a flat country, and low alkali plains lay between us and the river.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "flat country" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.