黄土

The second part give an all-around demonstration on eco-economic backgrounds of hilly gullied loess region and concluded that small watersheds are dominant landscape units that enable them to be basic for regional management and development.

第二部分综合阐述了黄土高原丘陵沟壑区的生态经济背景，指出：小流域为黄土丘陵沟壑区的优势景观单元，是区域治理与发展的基本单元；并提出区域治理与开发的生态与生产定位：区域应以水土保持、改善生态环境为新世纪的主要战略任务，国家的退耕还林草政策为区域加大环境治理提供了新的契机；在生态环境明显改善的基础上实现粮食自给，实行农牧结合，重点发展畜牧业，有选择的发展经济林果业。

The second part give an all-around demonstration on eco-economic backgrounds of hilly gullied loess region and concluded that small watersheds are dominant landscape units that enable them to be basic for regional management and development. Ecological and economic strategies for regional development are also put forward: soil and water conservation to improve ecological environment should be first-line task the region shoulders in the new century."Grain for Green"policy provides chances of accelerating development for the region. Maintaining food self-supporting based on an improved ecological environment; combining agriculture and husbandry in the production system; taking husbandry as pivot while selectively develop cash forest.

第二部分综合阐述了黄土高原丘陵沟壑区的生态经济背景，指出：小流域为黄土丘陵沟壑区的优势景观单元，是区域治理与发展的基本单元；并提出区域治理与开发的生态与生产定位：区域应以水土保持、改善生态环境为新世纪的主要战略任务，国家的退耕还林草政策为区域加大环境治理提供了新的契机；在生态环境明显改善的基础上实现粮食自给，实行农牧结合，重点发展畜牧业，有选择的发展经济林果业。

The mean value of geomorphic parameters of heavy and coarse sediment load area of the middle Yellow River is 10.89, of which, the first sub-region of gullied rolling loess area is the maximum, the second sub-region of gullied rolling loess area and mountainous region second and dune sand area the minimum.

黄河中游多沙粗沙区区域地貌参数平均值为10.89，其中；黄土丘陵沟壑区第一副区最大，黄土丘陵沟壑区第二副区与土石山区次之，风沙区最小。

Haiyuan county belongs to mountainous region of Longzhong loess hilly gullied region in the loess plateau,and there are seven kinds of geological hazards types existing in Haiyuan county ,including soil erosion and water loss,landslide,breakdown,mud rock flow,unstable slope,ground collaps and ground fracture etc.

海原县地处黄土高原，属陇中山地与黄土丘陵区，主要地质灾害有水土流失、滑坡、崩塌、泥石流、不稳定斜坡、地面塌陷和地裂缝等7种类型，以及人类工程经济活动引起的地质灾害类型。

The ecological environment of the Loess Plateau was warmer and moister than it is today, there was more luxuriant vegetation, and the forest land occupied about 25 % of the entire Loess Plateau.

黄土高原的生态环境较当今温暖湿润，植被更为繁茂，林地约占整个黄土高原面积的25%。

Based on the research of influencing factors and regularities of distribution of loess side slope stability in Northwest, the author select Pingshuo Antaibao southern spoil bank as subject investigated, and abstract several the most rudimental influencing factors which are ubiquitous concerning slope stability in loess area such as sloping shape, slope ratio, bulk density, cohesive force, angle of internal friction, elastic modulus, Poisson ratio, water immersion.

本文在探讨黄土地区边坡稳定性的影响因素及其分布规律的基础之上，选取平朔安太堡南排土场为研究对象，抽象出对于黄土地区边坡稳定性具有普遍意义的几个最基本影响因子：坡型、坡比、容重、内聚力、内摩擦角、弹性模量、泊松比、水。

That is using the dynamic torsional shear apparatus, the tests of dynamic strength, dynamic modulus and damping ratio of Yangling unsaturated intact loess are carried out by using torsional cyclic load triaxial apparatus under different moisture condition, and the pore water pressure and pore air pressure of unsaturated intact loess are measured in testing process, as well as the obvious regularity are acquired from the study results.

将该方法应用于对杨凌非饱和黄土在不同湿度条件下进行了动强度及动模量和阻尼比试验，试验过程中实现了对非饱和黄土的孔隙水压力和孔隙气压力的动态测量，试验结果取得了比较明显的规律性。

The research and analysis of the loess cave dwelling disaster not only has the engineering background,but also has important humanity and ecological significance.

黄土窑洞是目前世界上建筑面积最大的地下工程群体，研究黄土窑洞病害问题不仅具有工程背景，也有重要的人文和生态意义。

The compressibility of single-line method is smaller than that of double-line method for lower initial moisture content, and is larger than that of double-line method for higher initial moisture content.

根据试验结果，总结出了黄土的压缩变形随饱和度变化的规律，发现无论单线法还是双线法，黄土的压缩性均随增湿而提高，随减湿而降低。

Through indoor conventional experiment, saturation test and non-confining compression strength test , research has been put to the physical and mechanical characteristics of the loess consolidated by Na_(2)SiO_(3) solusition, a Na_(2)SiO_(3) composite body, and the basic mechanical parameters of the loess near the Daming Palace Han Yuan Temple have been acquited.

通过室内常规实验、浸水实验、无侧限抗压强度实验，对Na2SiO3溶液加固的黄土-Na2SiO3复合体的物理力学特性进行了室内实验研究，取得了大明宫含元殿窑址附近黄土-Na2SiO3复合体的基本力学特性参数，可供该地区其他类似条件的遗址加固设计参考。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。