灌木的扩张也发生在其他环境中，比如半干旱草原和高草草原。
Shrub expansion has occurred in other environments, like semiarid grassland, and tall grass prairies.
在半干旱地区，草地通常是最主要的天然植被，而该地区主要的经济活动是家畜饲养。
The raising of livestock is a major economic activity in semiarid lands, where grasses are generally the dominant type of natural vegetation.
另一方面，在干旱和半干旱地区，湖泊数量少，湖泊之间距离远，减少了相互关联的可能性。
In arid and semiarid regions, on the other hand, the small number of lakes and the great distances between them reduce the possibilities for correlation.
美国西南部半干旱地区的湖泊水位在上一个冰河时代似乎比现在更高，这一事实曾一度归因于降水增加。
The fact that lake levels in the semiarid southwestern United States appear to have been higher during the last ice age than they are now was at one time attributed to increased precipitation.
过往沙漠的南部边界比现在的边界更靠北，而半干旱的草原和较浅的淡水湖泊覆盖了现在干旱平原的大部分地区。
The southern frontier of the desert was far to the north of where it is now, while semiarid grassland and shallow freshwater lakes covered much of what are now arid plains.
沙漠边缘的半干旱土地处于非常脆弱的生态平衡之中，而这些半干旱区域对于持续增加的环境压力的适应能力极其有限。
The semiarid lands bordering the deserts exist in a delicate ecological balance and are limited in their potential to adjust to increased environmental pressures.
在许多半干旱的地区中，同样存在树带界限的下限区域；在这片区域之内，由于缺乏水分，森林下沿区域的植被通常会逐渐变成干草原或沙漠。
In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
一路上，我们破坏了大多数我们曾经耕作过的的土地，经常把翠绿的自然生态区变成了半干旱的沙漠。
Along the way, we despoiled most of the land we worked, often turning verdant, natural ecozones into semi-arid deserts.
这个地区总体上是半干旱至干旱气候。
这个地区总体上是半干旱至干旱气候。
干旱区和半干旱区的造林主要受水分条件的限制。
The afforestation in arid and semiarid is restricted by water condition.
该机构表示，气候变化让半干旱国家(如苏丹)的粮食更为稀缺。
Climate change, it says, will make food even scarcer in semi-arid countries such as Sudan.
新疆地处亚欧大陆腹地，是典型的半干旱、干旱气候。
Xinjiang lies in Eurasia inland, has typical half-arid, arid climate.
风沙土是形成于干旱区、半干旱区的一种特殊性质的土。
Aeolian sandy soil is a kind of specific soil formed in arid or semiarid area. It has specific engineering property.
干旱半干旱沙区城镇绿化的生态效益评价研究尚属空白。
The ecological benefits evaluation of city greenest in arid sand area is blank.
风沙土是形成于干旱区、半干旱区的一种特殊性质的土。
Aeolian sandy soil is a kind of specific soil formed in arid or semiarid area.
机械化坐水种已成为中国半干旱区作物抗旱播种的有效措施。
Irrigating-sowing mechanization has become an effective measure on crop drought defying sowing in the semiarid region of China.
加拿大半干旱草原农业研究站化学实验室在加拿大西部很有影响。
The chemical laboratory of the Semiarid Prairie Agricultural Research Centre of Canada is very influential in western Canada.
粮食生产功能是耕地最基本的功能，在半干旱区有着特殊的重要性。
Cereal production is the most basic function of cropland, particularly important over semiarid areas.
从西北向东南，年降水量逐渐增加，气候由干旱、半干旱向半湿润过渡。
In the northwest to southeast direction, annual precipitation increases, leading to transition from arid, semi-arid to sub-humid climates.
浑善达克沙地是我国北方干旱半干旱区的主要沙地和严重荒漠化地区之一。
Otindag Sandland is one of the main sandlands and among the most seriously desertificated region in semiarid area of China.
同时对在半干旱荒漠草地大型项目区水土保持林体系的建设技术做了研究。
The study on construction technology of soil and water conservation forest system in large project district in semi arid desertification grasslands has been done.
本文综合分析了半干旱的吉林西部地区水文地质环境与土地盐碱化的关系。
This paper is based on comprehensive analysis of hydrogeologic environment to discuss the relations between water resource and land salinization in semiarid region.
东北半干旱区是我国北方旱农地区的重要组成部分，多数地区没有灌溉水源。
Northeast semi-arid region is one of the main parts of the north dry farming area, most of which no irrigation water resources.
东北半干旱区是我国北方旱农地区的重要组成部分，多数地区没有灌溉水源。
Northeast semi-arid region is one of the main parts of the north dry farming area, most of which have no irrigation water resources.
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。
Extensive areas of the arid and semiarid regions have soils containing concentrations of soluble salts sufficient to adversely affect plant growth.
旱地耕作法：指一种在干旱或半干旱土地上不使用灌溉方法生产作物的耕作制度。
Dry farming; dryland farming: a system of producing crops in arid and semiarid regions without the use of irrigation.
这就意味着它在东部和南部非洲的树丛繁盛的栖息地同时半干旱的灌木丛里搜寻食物。
This means that it spends its days searching for food in the semi-dry bush in scrubby habitats of eastern and southern Africa.
雨水在许多地方可能会变得更加密集与多变，处在干旱和半干旱热带区的农民可能会变得更加脆弱。
Rain was likely to become more intense and variable in many places, and farmers in the arid and semi-arid tropics were likely to become more vulnerable.
雨水在许多地方可能会变得更加密集与多变，处在干旱和半干旱热带区的农民可能会变得更加脆弱。
Rain was likely to become more intense and variable in many places, and farmers in the arid and semi-arid tropics were likely to become more vulnerable.
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