荒地粮田，蒙大拿州，1999。
导致粮田面积减少的每一种趋势，背后都有着巨大的推动力。
Each trend that is shrinking the grain land area has a great deal of momentum.
后来由于过度放牧、开垦粮田和持续干旱，西北草原进一步遭到破坏，袭击北京的沙尘暴增加到一年十多次。
After that, overgrazing and ever-lasting drought had further devastated northern west prairie.
绿油油的粮田把它们的色彩洒过密苏里大峡谷的荒地。大峡谷是蒙大拿州东部一块孤寂的土地，大草原一直延伸到陡峭的和荒野的尽头。
Grainfields spill their color across the badlands of the Missouri Breaks, a lonesome swatch of eastern Montana where the Great Plains roll to an abrupt and wild end.
通过对北京市通州区徐辛庄镇土壤剖面水分的研究，得到了京郊平原区粮田的土壤水分垂直变异特征为各层间的变异表现出明显的层次性；
In this article, the vertical variable patterns of soil water of field in Beijing suburbs are studied. Soil water is significantly different in different layers.
通过对北京市通州区徐辛庄镇土壤剖面水分的研究，得到了京郊平原区粮田的土壤水分垂直变异特征为各层间的变异表现出明显的层次性；
In this article, the vertical variable patterns of soil water of field in Beijing suburbs are studied. Soil water is significantly different in different layers.
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