1·These rivers and river systems are known as "exogenous" because their sources lie outside the arid zone.
这些河流和河川系统被称作“外源河流”，因为它们的源头位于干旱地区之外。
2·Some amphibians adapt to arid environments by completing accelerated development with resting stages deep underground.
一些两栖动物通过在地下深处的休眠期内完成加速发育以适应干旱环境。
3·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。
4·Groundwater commonly collects in stream drainages but may remain entirely beneath the surface of dry stream-beds in arid regions.
地下水通常聚集在河流流域，但在干旱地区，地下水也可能完全保留在干涸河床的表面之下。
5·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.
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。
1·Only a thin layer of dust travels over land outside of the eastern edge of the desert, indicating that the dust may be lying low over the arid land, rather than rising high in the atmosphere.
沙漠东部以外的土地上仅仅只覆盖了薄薄的一层，这也就表明这些尘埃或许倾向于落在地势低而干燥的地方，而不是高高的升到大气中。
2·DAWN has just broken but classes have already started at the village school in Aqualaar, in the Garissa district of Kenya’s arid north-east.
尽管天刚破晓，阿奎拉乡村学校就已经开始授课了（阿奎拉位于肯尼亚东北部气候干燥的加里萨区）。
3·It is far from the science fiction fantasy of an underground lake, but still pretty impressive for a satellite long dismissed as arid and dull.
这与科学幻想中有地下湖泊的存在大相径庭，但也令人印象深刻，因为月球并不是通过卫星观察到的样子-既干燥又昏暗。
4·As might be guessed by the surroundings, the place is arid and the mission of the dam is to provide water storage for this particularly dry part of the United States.
可以从周围的环境看出，这地方比较干燥，而大坝的使命就是为美国这部分特别干旱的地区贮存水资源。
5·Water vapor in the lower atmosphere can vary in amount from a mere trace in arid regions to about 4% by volume in moist areas.
大气低层的水汽量在干燥地区（量）甚微，而在潮湿地区按体积占4%左右。
1·Asked to describe "Israel house", one focus group imagined it as arid, all-male and surrounded by barbed wire.
在被要求描述“以色列房屋”时，一个焦点组将之描述为：不毛之地、全是男性、铁丝网环绕。
2·The meadows, instead of looking lush and strewn with flowers, are now actually rather arid.
草地没有看上去苍翠繁茂，鲜花盛开，反而变成了不毛之地。
3·The grassy hills we climbed on our way out of Ulan Bator soon gave way to the much harsher, more arid landscape of the Gobi Desert.
列车爬过长着青草的山坡出了乌兰巴托，风景很快变成了戈壁沙漠的不毛之地。