沙地

With the ETM+ as data source,the Dimidiate pixel model was established based on vegetation index to extract vegetation coverage in Maowusu sandland.

以ETM+为数据源，基于植被指数建立像元二分模型，对毛乌素沙地进行了植被覆盖度提取，然后根据实地调查数据对提取结果进行了精度验证，二者线性相关系数达到了0.92，平均精度为79.4%。

Wang. They are half-shrub belonging to section Dracunculus of genus Artemisia. with close kinships and quite similar morphological characteristics. Distributed in sand of steppe region and desert region in northern China, they are edificators or dominant species of sand vegetation and important wind break and sand fixation plants.

Wang是同属于蒿属龙蒿组的半灌木蒿类，亲缘相近，形态特征十分相似，分布于中国北方的草原区沙地和荒漠区，并成为沙生植被的建群种或优势种，是我国防风固沙的重要植物。

Some driverless cars have also been made based on a buggy.

一些无人驾驶的车子也是在沙地车的基础上做出来的。

The research object of this thesis is Momoge wetland, which is the largest one in the droughty area of western jilin province.

莫莫格湿地处于吉林省西部干旱地区，东北科尔沁沙地边缘，是该区域面积最大的湿地区，对防止沙化，地域性水源涵养，气候调节，具有重要作用。

ABSTRACT This dissertation, based on the theories of geography, ecology, economics, sociology and environmental sciences, has analyzed the impact of transition between cultivation and pasture animal husbandry on the mechanism of desertification in Kerqin Sandy Region, of which behavior mechanism of local people was emphasized. The changing direction of integrated land desertification control strategy in semi-arid regions was discussed after having explored the primary reasons of estrepement, overgrazing and excessive firewood gathering. Followings are the main research works having been done.

本文选取科尔沁沙地作为研究区域，以两种最主要的土地利用方式、也是两种最主要的生产方式——农、牧业作为研究对象，依据地理学、生态学、经济学、社会学与环境科学的基本理论与方法，基于现有研究资料的系统整合，结合野外调查的结果，从更加综合的角度，来研究农、牧业选择变化对沙漠化过程的影响机理，从农、牧业选择变化的角度来揭示&滥垦、滥牧、滥樵&的本质，进而寻求中国北方半干旱地区生态环境综合整治的对策。

Results are as following:The causes of grassland desertification of Hulunbeir are the outcome of interaction of nature and the human beings. Among these reasons, the loose soil texture, which was formed in the fluviolacustrine sediment during Quaternary, establish the physical ground, and the drought and wind is the natural force of grassland desertification. And then over-cutting forest, over-grazing grassland, imbalance of resource utilization and estrepement reduce the coverage of vegetation, therefore provide necessary conditions for the grassland desertification.

其中，形成于第四纪河湖相沉积沙的疏松土壤母质，为日后土壤风蚀奠定了深厚的物质基础；干旱多风的气候条件构成了草地风蚀沙化的自然营运力；而人为过度砍伐沙地林木资源、沙质草地长期超载放牧、资源利用不平衡以及乱垦、滥挖等不合理经济行为，又降低了沙化草地植被覆盖度，为草地风蚀沙化提供了必要条件。

Structure index was significantly (P.05) different among three plant species whereas channel index and enrichment index were not. Plant species not only modified abundance of plant-feeding, omnivorous and predatory nematodes, but also percentage of each trophic group. Bacterivorous and fungivorous nematodes were affected most by the differences in plant species.

研究表明在沙地生态系统中，3种植物根际土壤线虫群落的多样性、丰富度、均匀度和线虫总数虽然都存在一定的差异，但不显著；功能多样性指数中结构指数存在显著差异，而通道指数、富集指数不存在显著差异；3种植物对根际土壤线虫群落中各营养类群线虫的比例有显著影响。

Yellow-flowered Eurasian glaucous herb naturalized in along sandy shores in eastern North America.

沿北美东部沙地海岸生长的开黄花的淡灰兰色欧亚草本植物。

There are several factors that can increase the chances of your tortoise getting RNS - dusty conditions, foreign bodies lodging in the nostrils, inappropriate humidity or temperature, lack of sunlight and the accompanying dampness, confinement in damp grassed areas with no access to sand, overcrowding, malnutrition, stress, and a deficiency of vitamin A.

有些因素会增加患RNS的几率：充满灰尘的环境，鼻孔处的外来寄生物，不合适的温度或湿度，缺乏日晒和相应的潮气，关在潮湿的草丛里，不能接触到沙地，过渡拥挤的环境，营养失调，过分紧张，缺乏维生素A。

The actuality of combination of farming and graziery incarnates the differences of two production systems, agriculture and stock raising, in aspects of input and output, absorbing labour force and intensity acting on environment, which is result of confliction and balance of human and environment. Of course this balance did not consider the environmental cost and ecological risk, and land degradation is the problem of this selection.

科尔沁沙地农牧交错的现状体现着农、牧业两种生产系统的投入产出差异、对劳动力消纳能力以及对土地作用强度的多相矛盾，是人地矛盾协调与平衡的结果，是&人尽其责，地尽其用&追求最大效应的选择结果，当然这种选择是没有考虑环境成本与生态风险，而土地退化就是这种选择对生态环境影响的重要表现形式。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新