... 半干旱性土壤 semiarid soils 帮助性质的付款 constructive payment 比较条件 comparison criteria ...
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CARACOLLO, Bolivia—It's as inhospitable as climates come for crop cultivation, the dry and rocky soils of Bolivia's semiarid altiplain.
玻利维亚开那哥罗地区，这个雨量稀少的反平原地区，其干旱、多石的土壤和该地气候一样对作物的培育不利。
Extensive areas of the arid and semiarid regions have soils containing concentrations of soluble salts sufficient to adversely affect plant growth.
干旱与半干旱区域的广大面积含有对农作物足以造成不利关系的高浓度溶性盐。
The vegetation and soils in most of the arid and semiarid zones have been degraded, usually by overgrazing and the removal of plant cover by fire or the axe.
大多数干燥和半干燥地带的植被和土壤严重退化，其原因通常是过度放牧及滥砍滥伐和火灾。
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