Such programs are much needed because in many arid lands there is only a vague idea of the extent of groundwater resources.
这样的计划是非常必要的，因为在许多干旱地区，我们并不清楚其地下水资源的范围。
Regularly flowing rivers and streams that originate within arid lands are known as "endogenous".
起源于干旱地区的流动性河流和溪流通常被称为“内源河流”。
The United Nations Environment Programme and the World Bank have funded attempts to survey the groundwater resources of arid lands and to develop appropriate extraction techniques.
美国国家环境总署和世界银行开始拨款并着手调查干旱地区的地下水资源，以开发合适的开采技术。
Arid lands, surprisingly, contain some of the world's largest river systems, such as the Murray-Darling in Australia, the Rio Grande in North America, the Indus in Asia, and the Nile in Africa.
令人惊讶的是，干旱地区拥有着世界上最大的一些河流系统，如澳大利亚的墨累-达令河、北美的里奥格兰德河、亚洲的印度河和非洲的尼罗河。
Groups traveling arid lands often fail to carry adequate water or a way of purifying water from natural sources.
组队旅行在干旱地区经常会由于没有足够的水或没有从自然资源中找到净化的水而失败。
Marakachi 556: It lives in arid lands. When it moves its body rhythmically, it plays a sound similar to maracas.
它生活在干燥的地方，当它有节奏地舞动身体时会发出像沙锤的声音。
With limited water in arid lands, desert travelers must strive to reduce their impact on the animals struggling for survival.
在贫瘠的土地中水资源极为有限，行走沙漠一定尽力减少对活在生存线上的动物造成影响。
Recalling the arid lands from which he had just returned, Sherman replied, "Between you and me, Sir, I feel that we'll have to go to war again."
谢尔曼想到他刚刚离开的旱土地，回答说：“这一点只可以你知我知：我认为得再打一场。”
The paper, based on natural condition and social characteristics of arid lands, expounds the principles, scales, basic facilities and structure for newly constructed villages and towns.
本文依据干旱地区的自然条件，社会基础特征，论证了干旱地区新建绿洲村镇居民点建立的原则、规模、基础设施要求与布局原则。
Globally, 1.3 billion people live on fragile lands - arid zones, slopes, wetlands, and forests - that cannot sustain them.
全世界有13亿人口生活在已无承受能力的脆弱的土地上-包括干旱地区、坡地、湿地和森林。
In the arid and poor mountain lands, shrubs are used to conserve soil, water and headwater and to improve ecological environment, which can not be replaced by any tree species.
在干旱瘠薄山地，灌木保持水土、涵养水源、改善生态环境等方面具有乔木树种不可代替的作用。
And yet today it is one of the most barren, arid, and unproductive lands in the world.
但今天﹐它却是世界上最为贫瘠﹐干旱和不长粮食的地方之一。
And yet today it is one of the most barren, arid, and unproductive lands in the world.
但今天﹐它却是世界上最为贫瘠﹐干旱和不长粮食的地方之一。
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