茫茫大草原向西伸展，直至天边。
从东到西，从西到东，旅人飞快地驶过茫茫大草原，驶向苍茫天际，穿过一望无际的玉米地；高不可测的苍穹，硕大的云朵，老是几乎平淡无奇、千篇一律。
From east and west, travelers dart across these prairies into the huge horizons and through cornfields that go on forever; giant skies, giant clouds, an eternal nearly featureless sameness.
但后来，这片土地干涸殆尽，昔日青翠的大草原变为茫茫荒漠。
But then the Sahara dried out, turning from a green savannah into an inhospitable desert.
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