黄土

Twelve soil samples from 0~20 cm soil layer were collected from north to south in the Loess Plateau calcareous soil and analyzed for fractionation of organic and inorganic soil phosphorus by Hedley method, amended by Tiessen and Moir.

以黄土高原自北向南采集的12个0~20 cm耕层土壤为供试土样，采用Tiessen和Moir修正的Hedley土壤有机无机磷分级方法研究了黄土高原石灰性土壤中不同形态磷组分的分布特征。

This paper systematically summarized and analyzed general development characteristics of soil profile CaCO3 in Loess hill gully area including source, content, forming-condition, distribution and illuviation- depth of CaCO3, which will have the most important significance for the further studies on global soil and climate change.Soil CaCO3 eluviation-illuviation is a relatively complicate process, soil CO2 is one of the important effect factors, which influences soil CaCO3 through controlling soil pH value and CaCO3 solution capability.

碳酸钙在土壤剖面中淀积的深度和类型是黄土高原土壤发育的重要标志，钙积层是黄土高原土壤发育环境的历史信息库，同时土壤碳酸钙作为土壤无机碳库重要组成，它通过溶蚀后再结晶与大气CO_2之间进行物质交流来影响全球气候变化。

The main magnetic minerals in L1 and S1 are magnetite, maghemite and ilmenite.

这是黄土高原东缘风成沉积物不同于中、西部黄土的特征。

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。

The eolian loess-paleosol sequences on the Loess Plateau basically record a history of alternation between winter and summer monsoon dominance, which can be seen as a reflection of global climatic cycles in East Asia. So far, spatial and temporal pattern of East Asian summer monsoon has been reconstructed mainly by magnetic susceptibility record.

黄土高原风成堆积的黄土-古土壤序列完整记录了东亚古季风气候的变迁，即冬季风优势期和夏季风优势期相互交替的历史，可视为全球古气候旋回在东亚地区的表现。

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。

The change of matric suction is very significant because of density changes.

本文对非饱和黄土的物理力学性质及渗透特性进行了阐述，并对非饱和黄土中水势的构成进行了分析；根据离心机法测定土壤水分特征曲线随温度和干密度的变化情况。

According to the characteristics of collapsible loess ground and the practice of multistoried engineering,the designing and testing of earth pile composite ground is introduced and the advantages of earth pile in treating thicker collapsible loess ground in multistoried engineering is proved.

针对湿陷性黄土地基的特点，结合多层建筑的工程实际情况，介绍了土挤密桩复合地基的设计和检测工作，阐述了土挤密桩在多层建筑中处理厚度较大的湿陷性黄土地基的优势。

This paper explain the results and suggests that the upper part of the section is normal loess/paleosol series, while the lower part is redeposited loess and paleosols.

结合该剖面的岩石磁学性质与该区域其他剖面以及洛川剖面的对比，本文的解释是该剖面上部为正常的黄土古土壤序列，而底部为再搬运沉积的黄土古土壤。

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％。