荒漠

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。

Flora of clay desert is similar to that of detritus desert.

粘土荒漠上的植物和碎石荒漠上的植物相似。

In view of Helan Mountain-Yinchuan basin is a ecological Continuum, it's innovative to put forward the holistic system of Helan Mountain-Yinchuan Basin as suitable scale for landscape management. Based on the fact that Helan Mountain-Yinchuan Basin in a circle composed by deserts and Loess Plateau,and seven vegetation ( the mountain forest belt,mountain shrub-grass belt,mountain foot desert grassland belt,oasis belt in diluvial fan plain,oasis belt in alluvial plain,wetland belt near the Yellow river, desert grassland belt in Obrdos platform) belong to the system, a"mountain-plain oasis-river-platform eco-productive paradigm"is proposed.

基于贺兰山——银川盆地是一个生态连续的复合系统，创新性地提出以整个山盆系统做为景观整体管理的尺度；基于贺兰山——银川盆地处于生态脆弱圈内山地森林带、山地灌草带、山麓荒漠草原带、洪积平原带、黄河冲积平原带、黄河滩涂湿地带、鄂尔多斯台地荒漠草原带等7个植被带的水平和垂直地带性特点，提出了贺兰山——银川盆地系统山地-平原绿洲—黄河—台地的生产生态范式。

The water resources change is a leading factor in the vegetation degeneration there; The swamp vegetation was based on the background of large-scale lakes and rivers; the halophyte meadow was based on the background of dry lakes and riverside, and desert vegetation was based on the background of desert; desert vegetation was based on the background of desert at present.

水资源的变化是决定当地植被退化的主导因子，在大面积湖泊、河流背景上是沼泽植被，在干涸湖泊、河床背景上的是盐生草甸植被，在沙质荒漠背景上的是荒漠植被。

Populus euphratica heteromorphic leaves can adapt different environment in different developmental stages through the changes of leaf shape,anatomical structure,physiological metabolism and protein expression,which can be presumed as the major reason for Populus euphratica survival in the arid and semi-arid desert region.

胡杨的异形叶能通过形态、结构、生理代谢及蛋白质表达水平上的变化来更好的适应不同发育时期生存环境的改变，推测这就是其优于其他树种而能在荒漠地带生存至今，成为干旱荒漠地区唯一天然存在的高大乔木的原因。

Objective The regularity of population dynamics of mongolia five toed jerboa were studies in the central and western region of Inner Mongolia to provide the basis of prediction and control.

五趾跳鼠是我国北方荒漠和半荒漠草原上的主要鼠种之一，在农区及典型草原区也有分布，数量多时会对农、牧业造成危害。

In pace with the human economic activities, the desert community dominated by jird and jerboa will be replaced by the damp community dominated by M.musculus and C.migratourius. The new community pattern is that R.norvegicus will play an important role in some urban areas.

随着人类经济活动的增长，荒漠被大量开垦为农田，以及新兴市镇的涌现，使得原来以沙鼠属和跳鼠科为主要成分的荒漠鼠类群落逐渐被喜潮湿的灰仓鼠和小家鼠所替代，有些地区还出现了以褐家鼠为主的新格局。

The fossil pollen date showed that vetetation changed from desert steppe dominated by Artemisia in early Holocene, though desert dominated by Chenopodiaceae at 9.0-6.3 ka, desert steppe dominated by Artemisia at 6.3-2.5 ka, to desert dominated by Compositae at 2.5-1.0 ka and Chenopodiaceae after 1.0 ka.

青土湖剖面孢粉分析结果显示，该区9.0ka之前为蒿属为主的荒漠草原，9.0～6.3ka藜科为主的荒漠，6.3～2.5ka蒿属为主的荒漠草原，2.5～1.0ka菊科为主的荒漠，1.0ka之后为以藜科为主的荒漠。

Sympegma regelii community, a rangeland desert vegetation, has the highest Shannon-Winner species diversity indices (1.706); the communities of Haloxylon ammodendron and Ephedra przewalskii, which have obvious feature of desert vegetation, are in the middle in species diversity indices (0.875-0.890); the communities of Calligonum mongolicum, Populus euphratica, Tamarix ramosissima and Glycyrrhiza inflata, characterized by desert forest of which saline desert bushes and saline meadows are scattered in the communities, have lowest value of the species diversity indices (0.079-0.495). 3 The structure of desert plant community is dominated by the bush layer. The species diversity indices of bush layer (0.769-1.451) is much higher than that of herb layer (0.193-0.254), and the diversity in herb layer is strongly influenced by bush layer. 4 The species diversity of desert plant communities shows a gradient of change with respect to longitude, latitude and elevation. For example, rangeland plant Sympegma regelii, with a high level of diversity indices (1.706), is in transition to desert plants Haloxylon ammodendronn community (with a low level of diversity indices of 1.379) in a longitude gradient and to saline Tamarix ramosessima community (with a low level of diversity indices of 0.376) in a latitude gradient. Calligonum mongolicum community, with a low level of species diversity (0.819), is in transition to Ephedra przewalskii (with a low level of diversity indices of 0.890) and Haloxylon ammondendron community (with the diversity indices of 0.645) in an elevational gradient.

群落Shannon-Wiener物种多样性水平表现为合头草群落最高(1.706)，具有草原化荒漠植被类型的成分；梭梭群落、膜果麻黄群落居中(0.875~0.890)，荒漠植被类型特征明显；沙拐枣群落、胡杨群落、多枝柽柳群落、胀果甘草群落较低(0.079~0.495)，荒漠林、盐地沙生灌丛及盐化草甸植被均有零星分布。3荒漠植物群落结构层次中，灌木层占居主导地位，群落灌木层物种多样性水平(0.769~1.451)远远大于草本层(0.193~0.254)，且草本层物种多样性受灌木层影响较大。4荒漠植物群落物种多样性分布格局表现为经向、纬向和海拔梯度的变化，经向、纬向变化为物种多样性水平较高的草原化植物合头草群落(1.076)向物种多样性水平较低的荒漠植物梭梭群落(1.379)和盐化植物多枝柽柳群落(0.376)的过渡，海拔梯度则呈现低水平的沙拐枣群落(0.819)到高水平的膜果麻黄群落(0.890)向低水平的梭梭群落(0.645)变化。

Morphological and structural characteristics of kidneys in Felis bieti and Felis lynx were investigated using anatomical and histological methods and the relationship between function and this character were discussed.

荒漠猫和猞猁肾组织结构的比较研究摘要为了了解荒漠猫和猞猁肾脏组织形态学的生态适应性特征，为保护野生动物资源和饲养繁殖管理提供组织形态学资料，应用解剖学和组织学方法观察了荒漠猫和猞。。。

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。