沙漠化

In the past 50 years, the quickening process of aeolian desertification has caused the major environmental and socio-economic problems.

中国北方在过去的50年里，沙漠化土地以其广泛的分布和迅速发展构成了区域主要的环境和社会经济问题。

But in recent years, aeolian desertification has slowed down due to the efforts of the governments and the local people, about 1,280 km^2 annually on the decrease.

但最近几年来，经过政府和当地人民的共同努力，沙漠化有明显逆转的趋势，大约每年以128平方公里的速度在减少。

At present, the aeolian desertification is still facing the situation of "partly controlled but whole worsen".

目前我国沙漠化防治仍然面临着"局部治理，整体恶化"的严峻态势。

According to some research and summarize, we advance the stratagem, guidelines, basic principle and measures for combating aeolian desertification in China.

根据研究和总结，提出了我国沙漠化防治的战略、指导方针、基本原则和途径。

But at the same time,itexisted in the fact that the water environment was amended,showingthat many lakes and ponds such as Hong Jiannuo Lake appearing andexpanding in the end of Qing dynasty.4.The vegetation in Mu Su Desert passed through several phases inhistorical times,the main phases are:the species composition ofvegetation community was gradually simplified;xeromorphous and sandyplant increased;the status of desert vegetation rose evidently.However,the change of vegetation zonation means that forest plainchanged into drought plain did not occur.5.The main modality of Mu Su Desert land degenerating has beendesertification,it had occurred before human activities intervenedintensively.Two-thirds of land has been desertification at variousdegrees.

但与此同时，也存在着局部的水环境改善，突出表现为红碱淖等湖沼在清末民初的出现和扩大。4、毛乌素沙地的植被在历史时期经历了群落种类组成渐趋简单、旱生沙生资源植物增加、荒漠植被地位明显上升等变化，但是并不存在由森林草原到干草原的地带性植被变化。5、沙漠化是毛乌素沙地土地退化的主要表现形式，在人类活动强烈干预以前就存在着，秦汉以来，有大约2／3的土地发生了程度不同的沙漠化。

A linear Bio-economic Model is introduced in this paper to an-alyze the farmer households'land use decision,their income change and driving forces under different land use regulation and other environmental policy scenarios in an agro-pastoral area of Inner Mongolia,China.

论文以内蒙古沙漠化地区为例，运用Bioe-conom ic M odel，比较自由放牧与耕垦、禁牧与禁垦、控制放牧规模与禁垦的土地利用政策情景下，引进舍饲养牛技术与信贷服务和增加非农就业机会对农户土地利用决策及其家庭收入的影响，据此探讨中国北方地区沙漠化发展的人文驱动机制以及生态重建的环境政策。

In the study, the author selects the Argan Region which is typical cases (in the lower reaches of Tarim River) and gathers some materials by means of fieldwork and according to the aeropho...

本文在此基础上，选择塔里木河下游的阿拉干这一典型地区，通过野外考察(1985年5月进行)和不同时期航空相片的判读、量算，针对地表形态的变化和其各种类型的动态分配，来说明该地区的沙漠化过程；并试图运用计量地理学的方法，建立一个多元线性回归方程的数字模型对该地区沙漠化过程的发展进行预测。

The Aeolian Desertification Science is the science which studies aeolian desertification processes, taking the areas where sand-blown activities are the dominant disaster phenomena as the whole Ecology-Environment-Society-Economy complex.

沙漠化科学是将风沙活动为主导灾害现象的区域作为完整的生态－环境－社会－经济综合体，开展沙漠化过程及其防治研究的科学。

The strong resilience of annual herbaceous plants is ensured by ample seed source in soil seed bank.

不同沙漠化程度的群落中，即使沙漠化程度最严重的流动沙地上，只要群落一旦建立，就有足够数量的种源。

Therefore, the process of desertification control is the SD process .

沙漠化全面治理的过程正是沙漠化地区向可持续发展的过程。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。