Dependence on long-distance trade also meant that the great empires of the Middle East were built both literally and figuratively on shifting sand.
对长途贸易的依赖也意味着，伟大的中东帝国无论是实际上还是象征意义上，都是建立在流沙之上的。
Some measures are needed to secure the farmland against shifting sand.
需要采取措施使农田免遭流沙的侵袭。
Shifting sand of the ocean floor helps the sculptures evolve over time.
久而久之海底的流沙有助于雕塑的形成。
These tree belts effectively protect the farmland against shifting sand.
这些防护林带有效地保护了农田，使之免受流沙侵袭。
These tree belts protected 500,000 acres of farmland against shifting sand.
这些防护林带保护了50万英亩农田不受流沙侵袭。
The fencing effect of the net fence in shifting sand area also shows difference among three wind directions.
流沙区尼龙网栅栏的防沙效益亦表现出在三组不同风向上的差异。
I reach out my hands; grasp air - as a last resort hurdle the last few feet of the ditch onto shifting sand - catch my balance - made it!
我想抓空气是我当时唯一的办法了吧。就这样保持着过了前面几英尺的小沟，最后顺利到了流沙上，哈，我做到了，我保持住了平衡。
I reach out my hands; grasp air - as a last resort, hurdle the last few feet of the ditch onto shifting sand - catch my balance - made it!
我想抓空气是我当时唯一的办法了吧。就这样保持着过了前面几英尺的小沟，最后顺利到了流沙上，哈，我做到了，我保持住了平衡。
Therefore, how to prevent and control the shifting sand, is a technical key question, which should be solved in the sub-base earthwork.
为此如何防治流砂成为基坑土方施工需要解决的一个技术难题。
The fence function increase because of barriers be joined, and the shifting sand can be effectively controlled inner the barriers system.
格栅沙障因障间互相连接而增强了防护功能，使得流沙被有效地控制在体系内部。
Don't approach! Don't approach the blue color seeming warm, which is actually the nightmare, the quagmire, the shifting sand and even the hell!
不要走近，不要走近那片看似温暖的蓝色，那是噩梦，是沼泽，是流沙，是地狱！
The differentiations of calculating lacunarity indices of shifting sand dunes which have same area but different distribution forms are obvious.
详尽地分析了流动沙丘面积相同，分布形式不同而产生的间隙度指数差异。
Research on the processes of wind erosion of cropland, desertification of grassland, reactivation of fixed dunes and shifting sand movement reveals th...
并论述了农田风蚀、草场沙化、固定沙丘活化及流沙前移等主要类型土地沙漠化的发育过程。
The methods of pipe excavating and foundation treatment in silt and shifting sand areas were presented, which were proved feasible through a practical example.
着重从淤泥流砂地区的管槽开挖和基础处理两个方面进行分析论述，并引用实例论证该方法的可行性。
In coastal area deep foundation pit excavating meets problems of slope collapsing and shifting sand due to high water level and the sand soil geological condition.
沿海地区水位高，地质条件以砂土为主，大面积砂土深基坑开挖易坍塌或形成流砂，给施工带来巨大的困难。
The major succession processes of vegetation association are consistent with the process from which the shifting sand turned into fixed sand . the models of succession series are: Comm.
基质条件和人为影响是豫北沙地植被演替的主要因素。主要的演替形式是由无植被向固定沙地稳定群落的进化型演替。
The relation of wind velocity and total amount of sand transport also changes with vegetation coverage: On shifting sandy land, wind velocity has a cubic function to the sand transport;
随着植被盖度的变化，风速与输沙率的关系也发生变化：流动沙地上风速与输沙率呈三次函数关系；
It resembles a statue of marble which stands in the desert and is continuously threatened with burial by the shifting-sand.
它就像树立在沙漠里的一座大理石雕像，随时承受着被流沙埋藏的威胁。
These patterned stripes are part of Erg Chech, a desolate sand sea in southwestern Algeria, Africa, where the prevailing winds create an endlessly shifting collage of large, linear sand dunes.
这些规则状的条纹属于舍什沙漠的一部分，位于非洲阿尔及利亚西南部荒凉的沙海，不断吹拂的大风创造出无数漂移不定、呈线性的沙丘。
Following its keen nose, a dingo prowls the edge of a sand blow-an ever shifting expanse of silica.
在灵敏鼻子的引导下，一只澳洲野狗徘徊在吹沙边缘——永远移动扩张的硅土。
The result is a row of samples shifting from the relatively dark, coarse grains of the Northeast to the fine white beach sand of the Southeast.
结果就是看到的这组样本，从东北海岸相对暗一点粗糙些的沙子到东南海岸这些白皙且细腻的沙子。
Seen from above, the shadows cast onto the sand created shifting patterns like sundials.
从上面看，投在沙滩上的阴影创造了像日晷一般的移动模式。
As passing over the Sahara in northern Africa, Chiao took this picture of the Eastern Sand sea-a vast basin filled with shifting dunes-in Algeria.
北部非洲的撒哈拉沙漠。这张照片中是阿尔及利亚境内形状变化不定的沙海。
As passing over the Sahara in northern Africa, Chiao took this picture of the Eastern Sand sea-a vast basin filled with shifting dunes-in Algeria.
北部非洲的撒哈拉沙漠。这张照片中是阿尔及利亚境内形状变化不定的沙海。
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