在黄土台塬区和丘陵区中，丘陵区的粮食增产潜力较台塬区大，前者尚有117.6 %增产能力，后者仅56.6%。
Comparison of dryland potential yield increase in gully and hilly regions of Loess Plateau shows that potential yield increase in hilly region is 117.6%, and only 56.6%in gully region.
气候最干燥的季节是是12月至3月，这也是在西部和南部沿海和丘陵地区旅游的最佳季节，而5月至9月则是到东海岸旅行的最佳季节。
Climatically the driest and best seasons are from December to March on the west and south coasts and in the Hill Country, and from May to September on the east coast.
丘陵和山脉通常被认为是永恒的象征，成功抵御着自然的破坏力量，但其实它们从地质学角度讲往往是相对短暂的。
Hills and mountains are often regarded as the epitome of permanence, successfully resisting the destructive forces of nature, but in fact they tend to be relatively short-lived in geological terms.
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