黄土的

The loess-paleosols in the Chinese loess plateau and Europe are the main eolian sediment sequences ...

中国黄土和中欧黄土是北半球中纬度地带重要的风成沉积序列。

The loess-paleosols in the Chinese loess plateau and Europe are the main eolian sediment sequences in mid-latitude area of north hemisphere.

中国黄土和中欧黄土是北半球中纬度地带重要的风成沉积序列。

The Loess Plateau is the most tremendous loess landform of the world .

黄土高原是世界最大的黄土地貌。

Directed against stress properties of lining structure of loess highway tunnel, the paper selects three loess highway tunnels as relying engineering according to buried depth and soil properties, and takes field observation synthetically for the first time, which pays more attention to researches on the change regulations of pressure acting on first lining and invert, axial force of lattice girder, contact stress between first and second lining, concrete strain of second lining verse the time and distributions in different positions.

针对黄土公路隧道衬砌结构受力特性，根据埋深和土质情况，选取三座黄土公路隧道为依托工程，首次开展了大规模系统的现场测试，着重研究了一衬和仰拱围岩压力、格栅拱钢筋轴力、一衬和二衬接触应力以及二衬混凝土应变时间变化规律及分布特性。

One of the most important methods to study the loess environmental and climatic change was by the loess' magnetic susceptibility curve.

而通过研究黄土磁化率曲线又是研究黄土环境变化的一种重要方法。

Simultaneous determination of phenanthrene and naphthalene in loess soils with synchronous fluorimetry

研究了萘和菲在天然黄土和阳离子表面活性剂改性黄土上的吸附动力学过程。

Lijiaxia landslide is a large rockslide , encountered in Loess Plateau which is famous for lots of loess landslides .

李家下滑坡是大型岩质滑坡，发育在黄土滑坡众多的黄土高原区。

In view of poor researches on stress characteristics of soil and lining in the loess highway tunnel, the paper analyses the performances of stress and deformation of soil and lining structure, the process of runnel construction, and water infiltration influences, and makes field observation of stress features of lining structure and theory research of surrounding rock pressure.

鉴于黄土公路隧道土体及衬砌力学特性研究不足的状况，论文针对黄土公路隧道工程进行了土体和衬砌结构受力与变形性状分析、隧道施工过程和浸水影响数值分析、衬砌结构力学特性现场测试和围岩压力理论研究。

Aiming at the geological defects in western loess highway region and its harmfulness for construction and management, we introduced multicomponent seismics method in shallow loess highway engineering exploration.

针对我国西部黄土公路下伏大量地质缺陷及其对公路交通建设和运营的危害性，将多分量地震勘探技术引入浅层黄土公路工程勘探中。

Based on this idea, the author has chosen two typical loess sections of Luochuan, and Xifeng for this study, collected the successive loess columns; To probe the conditional experiments of BeO sample preparation and measurement, and improve the existing method; On the basis of the technology improvement, the author has finished 402 samples' BeO preparation and AMS measurement; Also at the same time, to separate quartz from samples at 1 cm interval for both Luochuan and Xifeng sections systematically, to carry out measurements of quartz grain-size, SUS, grey scale, carbonate content and bulk sample density; By using the grain size model, the author has set up the chronological framework for both Luochuan, and Xifeng sections and the time sequence of millennial scale abrupt climate events recorded in loess strata, and reconstructed the East Asian monsoon history over 130ka by using multi proxies; Finally, to discuss the possible mechanisms of palaeoclimatic changes tentatively.

详细地球科学的发展离不开高精度和高分辨率的研究。运用长寿命核素如〓Be作为环境过程的示踪，已成为不可替代的有效工具。本论文选择洛川、西峰两个典型的黄土剖面，连续采集柱状样；探索了BeO样品制备、测量的条件实验，改进了原有的方法，完成了402个BeO样品的制备和AMS测量；同时还系统地分离洛川、西峰剖面高分辨率（1cm）黄土、古土壤样品中的碎屑石英，测量了碎屑石英粒度，以及全样的磁化率、灰度、碳酸盐含量和容重等古气候代用指标；采用粒度年代模式建立了洛川剖面和西峰剖面的年代标尺，建立了黄土地层记录的千年尺度的气候突变事件的时间序列，多指标重建了最近130ka东亚季风变迁史；初步讨论了古气候变迁的可能机制。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷