地层

By summing up the cyclicity, rock association and occurrence of volcanic rocks with their overlying and underlying contact relations and forming environment, and concerning the research results of isotope chronology and biostratigraphy, the Yixian formation of the working area may be subdivided into four members.

综合火山岩的旋回性特徵，岩石组合、岩石产出特徵，不同岩石组合的上、下接触关系和岩石形成环境的分析结果，结合同位素年代学及生物地层学的研究成果，区内义县组被划分成了4个岩性段。

In his more than half a century' s scientific and educational career, Professor Yang made significant contributions to Chinese geology and paleontology, especially in the fields of fossil brachiopods, Carboniferous biostratigraphy, paleobio-geography, and paleoecology.

杨式溥对中国西北和西南地区石炭纪的腕足动物化石的研究为中国石炭纪地层的内部界线划分、对比、化石组合、地理区系及沉积类型提供了重要证据。

Works on marine micropaleontology in China started in the late 1950's, and in the last thirty years, the marine micropaleontology in China has been greatly expanded into a full-fledged discipline that includes taxonomy, ecology, sedimentology, biostratigraphy, paleoenvironmental analysis and geologic resources prospecting, and deals with finding and explaining various species buildup, ecologic condition, sedimentary distribution, and their historical processes.

中国的海洋微体古生物学研究开始于20世纪50年代末，当时属于起始摸索阶段。真正发展并奠定基础的时期是在近30年以来，较为全面地开展了分类学、生态学、沉积学，生物地层学、古海洋环境分析与地质资源勘探应用研究等。

Based on the study of biostratigraphy and anoxic eventstratigraphy, we propose that the Qingshankou Formation may correspond to the oceanic anoxic event at the CenomanianTuronian boundary in the Cretaceous, and the age of the Qingshankou Formation in the Songliao Basin is the Late Cenomanian to the Early Turonian.

结合生物地层研究成果，认为青山口阶下部曾发生过古湖泊缺氧事件，其层位大体可与白垩纪古海洋CenomanianTuronian界线事件层进行对比，由此提出了松辽盆地青山口阶下部的时代归属于晚白垩世Cenomanian晚期-Turonian早期的新观点。

Based on the quality, momentum, and energy conservation laws and the state equation, considering the momentum loss of gas column flowing and the complicated thermal conduction mechanism in the bore-hole and formation, the pressure and temperature calculating method is derived for single-phase gas flow in different positions of the bore-hole.

文章以质量、动量和能量三大守恒方程和状态方程为基础，考虑了流动气柱的动能损失以及井筒和地层中复杂的传热机理，推导出计算单相气流在井筒不同部位压力和温度的方法。

Through the construction of the sea wharf bridge approach piling works of Shenneng Oil Depot Project in Qinzhou, the article expounds the basic sea piling construction procedure and techniques of bore-hole wall protection by steel pipe and hole-excavation by hand.

文章通过深能钦州码头油库工程海上码头引桥桩施工的工程实例，阐述钢护筒护壁人工挖孔在海上基桩施工的基本工序及施工工艺，证实钢护筒护壁人工挖孔施工工艺，在地层简单的浅海场地，是一种行之有效且无污染、机具简单、成本低、进度快的施工方

Therefore, this study will utilize detailed borings and testing programs, and the project is divided into four in-depth studies. These four sub-projects are:Sub-project 1: Study of rock properties and sedimentary environments.

由於这些都会区地质年代几乎都属第四纪更新世晚期所发育的冲积平原，不论是沈积环境、地下地质环境、地层分布或土壤工程特性，均呈现极大差异，不易掌握。

An assemblage of borings in bivalve shells is described from shallow-marine deposits of the upper Xintianmen Formation (Early Jurassic, early Sinemurian) near Xiaping, Yizhang County, south-eastern Hunan Province, southern China. Talpina hunanensis ichnosp.

论文描述的双壳类壳体内的钻孔遗迹组合发现于湖南省东南部宜章县下坪附近的心田门组上部(早侏罗世，早辛涅缪尔期)浅海沉积地层中。

Because of taking only advantage of the first item in scattering series, method of Born approximation inversion is only suitable to little disturbance imaging. And it will produce great error in condition of great perturbation.

考虑到上述问题，本文在Bleistein和Cohen等人对Born近似的深入研究基础上，运用地震逆散射理论进行深度成像，反演地层奇性界面的位置。

A rock mass of large horizontal extent bounded, especially above, by physically different material.

地层：一个水平的大岩石区域，特别是在它的上面邻接的是不同物质的材料

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％。