沙漠化

This paper studied changed properties of soils in the typical ecotone of Duolun County, Inner Mongolia for two years.

以典型生态脆弱区内蒙古多伦县为例，连续2a进行了沙漠化对土壤理化性质的影响研究。

Naiman Station for Desertification Experiment and Research is one of the field statioos of the Chinese Ecosystem Research Network.

奈曼沙漠化试验研究站为中国生态系统研究网络站。

Under the influence of tropical monsoon climate, the foehn effect of the rain shadow field of the Changshan Mountains and the Wuzhishan Mountains and the cold ocean current in the Beibu Gulf, it is developed into the semi-ari d climate and the environment of dry grasslands with sparse trees.

在大气环流、雨影区和海流的共同影响下，岛西形成热带半干旱气候和热带稀树草原环境，孕育并存在自然沙漠化发展的动力、空间和物质基础。

Main problems in the studies of cause and mechanism are as follows.

也是当前沙漠化研究的热点之一。

Chapter 5: inquisitional analyses of microcosmic scale desertification and human activity.

第五章：微观尺度人类活动与土地沙漠化调查分析。

The entironment is great threatened with sandy desertification in agriculture and husbandry interlace zone of northwest China.

土地的沙漠化是世界瞩目的严重生态问题之一，它直接影响到人类经济的发展和社会的稳定。

It has been one of the desertification training sites of UNDP, where water and has major ecological issues at basin scale.

深处内陆盆地，由于水资源匮乏而引起严重的流域生态问题，因此它也是联合国开发计划署指定的沙漠化研究治理区域之一。

The timber in the hurdle you jump and in the baton you pass, is timber illegally felled in Tibet, where deforestation, by China, has reduced a pristine, fragile, unique environment to a desolate moonscape.

你跨越的跳栏、传递的接力棒，用的是从西藏非法砍伐出来的木材，而在那，中国将原始、脆弱、独特的生态因沙漠化的恶化变成荒凉的月球表面。

In 1990s, the third stage is the most important period of research on sandy desertification in Qinghai-Xizang plateau, the sandy desertification problem in almost all over the Qinghai-Xizang plateau was studied, its research content is comprehensive and systematic and a lot of research results were gotten.

最后，分析了研究中存在的主要问题，如研究区域不尽平衡、基础研究较为薄弱、理论研究有待深入和防治技术亟待提高等，提出今后青藏高原沙漠化研究的主攻方向与主要研究项目。

External regulator of positive feedback is variation of precipitation amount and frequency of extreme precipitation. It is shown that desertification is predetermined by the decreased precipitation as well as by the decrease in frequency of precipitation. In the second half of 20th century importance of man-induced degradation of dry lands as additional regulator of positive feedback has been increased.

正反馈的外部调节因子是降水量的变化和极端降水事件的出现频率，降水量减少以及降水频率的降低直接影响沙漠化的程度。20世纪下半叶，人类因素导致的干旱土地退化作为另外的正反馈调节因子，其重要性正在增加。

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。