地理漫步·世界地理英语30篇（4）
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The Great Plains: Grasslands Between Two Climates
大平原：夹在两种气候之间的草原
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The Great Plains stretch from Canada to Texas, covering over 2.5 million square kilometers.大平原北起加拿大，南至得克萨斯州，面积逾250万平方公里。
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They lie in the rain shadow of the Rocky Mountains, receiving just 25–75 cm of rain yearly.它们位于落基山脉雨影区，年降水量仅25–75厘米。
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Native tallgrass prairies once supported bison herds, prairie dogs, and fire-adapted plants.原生高草草原曾养育野牛群、草原犬鼠及耐火植物。
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Modern wheat farming depends heavily on Ogallala Aquifer groundwater, now declining rapidly.现代小麦种植严重依赖奥加拉拉含水层地下水，而该水源正急剧减少。
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Wind erosion surged during the 1930s Dust Bowl when plowing removed protective sod.20世纪30年代‘沙尘暴’期间，翻耕破坏保护性草皮，导致风蚀加剧。
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Conservation tillage and cover cropping now reduce soil loss by over 60% in key counties.如今，保护性耕作与覆盖作物在重点县减少土壤流失超60%。
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Tornado alley forms where cold dry air from Canada meets warm moist Gulf air.龙卷风走廊形成于来自加拿大的干冷空气与来自墨西哥湾的暖湿空气交汇处。
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Grassland bird populations have dropped 50% since 1970 due to habitat fragmentation.由于栖息地破碎化，草原鸟类种群自1970年以来下降了50%。
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Prairie restoration projects reintroduce native forbs and grasses using prescribed burns.草原修复项目通过计划火烧重新引入本土草本植物与禾草。
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Farmers join regional networks to share data on soil moisture and weather forecasts.农民加入区域网络，共享土壤湿度和天气预报数据。