一半童真美ゝ关注了该问题 2018-06-26 16:58

1.Regularlyflowingriversandstreamsthatoriginatewithinaridlandsareknownas"endogenous."Thesearegenerallyfedbygroundwater springs,andmanyissuefromlimestonemassifs,suchastheAtlasMountainsinMoroc...