查询词典 desertification

Desertification is one of most serious environmental and social-economic problem in the world, which has been suffering China for a long bine.

土地荒漠化已成为受其影响地区经济发展和环境保护的一个重要障碍，及时了解其过程、现状和发展趋势，对确定荒漠化防治的战略和措施均有重要意义。

Its research areas Include: Climatology and biometeorology; Rainfall and its biological effects; Erosion and the deposition of sediments: dust storms; Dunes, their structure and formation; Microclimatology; Dew and hygroscopic moisture; Soil flora and fauna in arid lands; Seed germination and its improvement; Vegetational studies in desert regions worldwide; The physiology and ecology of plants and animals; Foraging patterns of mammals; Parasites and predators; Diurnal rhythmicity and phenology; The impact of grazing; Wildlife conservation; Anthropology and sociology of desert peoples; Oasis settlement; Human ecology and traditional land use; Land classification and improvement; Water control; Remote sensing; Desertification, its causes and control.

具体内容包罗万象：气候学和生物气象学；降雨和它的生物影响；沉积物的腐蚀和沉积；沙丘结构和形成；干旱地区的植物和动物群；寄生物和捕食动物；干旱地区的人类学和社会学；干旱地区的绿地建设；水控制和干旱地区的沙漠化的成因和控制等。

Several results have been achieved as followings: 1. The response of stable carbon isotope in karst cave system to surface climate and environment This index can distinguish origin forest from other vegetation, but cannot distinguish transitional eco-environment such as bosk, grassplot and rocky desertification.

洞穴系统稳定碳同位素对地表气候环境的响应通过对4个不同生境洞穴系统的研究，认为洞穴系统稳定碳同位素可以很好地将原始森林植被同其它植被类型区分开；但是不能很好地区分植被退化的过渡类型如灌丛、草坡以及石漠化等。

Taking cave systems under different vegetation in guizhou karst area as study objects, this paper analyzes the spatio-temporal evolution of stable carbon isotope in karst cave system. Vegetation of Liangfeng cave, Qixing cave, Xiniu cave and Jiangjun cave are respectively origin forest, bosk, grassplot and rocky desertification.

本论文在贵州岩溶地区选择了上覆植被分别为原始森林、灌丛草坡、草坡和石漠化的凉风洞、七星洞、犀牛洞、将军洞作为研究对象，对岩溶洞穴系统稳定碳同位素的时空演化规律进行了详细的分析，得出以下几点认识：一。

It is very necessary to carry over comprehensively study to understand the process desertification in quantity.

还需要继续深入和系统地研究，特别是对定量研究方法论的探讨，可能成为一个突破点。

From these data, the desertification has developed based on the fluctuating humidity before 1980s and reverse after 1980s in study area. The results from analysis on climate and land use change in late 50 years show that changefully precipitation is the main natural background that...

对研究区近50a来的气候及土地利用方式变化的分析表明，气候因素中降水的多变性是研究区土地沙漠化发生的自然背景，而滞后于气候变化的土地利用方式改变则是研究区沙漠化最主要的成因。

Climatic changes are both a consequence and a cause of desertification.

气候变化既是沙漠化的后果，也是沙漠化的成因。

The process of natural succession of restoring vegetation in central Guizhou after rocky desertification in Karst area was divided into the herbosa stage, the stage of herbosa-shrub, the stage of vine-shrub, the stage of subaltern tree forest and the climax stage.

黔中喀斯特地区石漠化后，植被恢复自然演替过程可分为草丛阶段、草灌阶段、藤刺灌丛阶段、次生乔林阶段和顶级群落阶段。

In fact, the polar ice is desertification, only one of the most cold desert.

事实上，极地冰盖就是荒漠，只不过、是世上最寒冷的荒漠。

The experimental teaching centre of forest resource cultivation and conservation was set up, including soil and water conservation laboratory, desertification combating laboratory, forest cultivation laboratory, seed and seedling laboratory, landscape architecture plan room, forest genetics and breeding laboratory, forest management laboratory, forest protection laboratory, dendrology laboratory, among which specimen room acceded to Chinese Plant Specimen Museum Net and was registered and accepted by international plant taxonomy society, with the international code of GAUF.

其中树木标本室已加入中国植物标本馆网络，并被国际植物分类学会注册认可，国际代码为GAUF。

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。