N-UNCOUNT 大草原,干草原(尤指从东欧横穿苏联南部直至西伯利亚的大片地区)Steppes are large areas of flat grassy land where there are no trees, especially the area that stretches from Eastern Europe across the south of the former Soviet Union to Siberia. 大草原,干草原(尤指从东欧横穿苏联南部直至西伯利亚的大片地区)