古生代的

Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants.

分布于欧洲和加拿大东部的古生代简单的二岐式植物，包含最古老的脉管陆地植物。

Beiqinling is between Shangdan Fault and Baoji-Luonan-Luanchuan Fault, it have own particularities in structure, geochemistry, physical geography and stratigraphy, on the stand of tectonic, it's the real division between north China and south China, and the key region to study the evolution of Qinling erogenic belt during later Paleozoic-early Mesozoic.

北秦岭构造带夹持在宝鸡—洛南—栾川断裂带和商丹断裂带之间，其组成及结构构造既不象其北侧的华北板块南缘构造带那样与华北板块相似，也不象其南侧的南秦岭构造带那样与扬子板块相似，在地层、构造、地球化学和地球物理各方面均具有独特性，从大地构造意义上说，它才是中国大陆南北之间的真正分界带，也是解析秦岭晚古生代一早中生代演化的关键区段。

Also, there is no formula can be used to calculate errors of these parameters.Based on above reasons, the purposes of the research are to build a reliable geochronological framework of Paleozoic granitoid in study area, to distinguish their genetic types and tectonic settings, and to analyses their orogenic response; to derive a set of formulas for calculating errors of the paramers mentioned above; to ascertain if North Qaidam belongs to North China Block or Yangtze Block.

基于上述存在的问题，本项研究的目的是：建立研究区古生代花岗岩类精确的年代学格架，判别其成因类型和构造环境，分析其造山响应：推演出一套适用于Sr、Nd同位素初始比值和Nd同位素模式年龄等重要示踪参数误差计算的公式；确定柴北缘地区大地构造属性(华北板块还是扬子板块？)。

Recently, based on the field work we have recognized that those basic rocks actually were oceanic basalts intergrown with Late Paleozoic deep water deposits, rather than continental rift basalts.

根据近年的野外工作，我们已经指出这些基性岩实际上是与晚古生代深水沉积共生的海相玄武岩，而不是象过去认为的大陆裂谷型玄武岩。

We divide the evolution of becoming rocks into four periods: early region's metamorphic process and mixed lithifaction,sedimentation and becoming rocks process in middle and late Proterozonic Era and in the Paleozonic Era,trasformation process of burial hill layers in earth shell'uplift period in the Mesozonic Era, and transformation process to burial hill in the Cenozonic Era.

将储层的成岩演化划分为四个阶段：即早期区域变质作用和混合岩化作用、中晚元古代和古生代沉积成岩作用、中生代地壳抬升阶段潜山地层的改造作用和新生代断裂对潜山的改造作用。

At last, based on the wavelet transform of logging signals, the stratigraphic sequence correlation and analysis of the coalbearing strata of Permo-Carboniferous in Luxi and Jiyang area have been done. The stratigraphic sequence framework of main coal-bearing strata formed in Neopaleozoic in Shandong area is established.

最后在测井信号小波变换的基础上对鲁西和济阳凹陷的含煤地层进行了层序对比和分析，基本建立了山东地区晚古生代主要含煤地层的层序地层格架。

This discovery is of great significance for understanding the late Paleozoic ophiolitic mélange belt in the area north of the Junggar basin of China and its extension beyond China.

这一发现对于认识中国准噶尔盆地以北地区的晚古生代蛇绿岩带及其向境外的延伸具有重要的意义。

This ophiolitic tectonic melange is composed of some complex slabs from different tectonic settings and structural levels, which underwent different metamorphism with different PTt paths and reworking. The PTt path study in this paper reveals that Sanchazi metagabbro from Mian-Lue Suture zone of Qinling orogenic belt underwent two metamorphic and tectonic stages.

摘 要 勉略带是近年来秦岭造山带研究中揭示出来的代表晚古生代小洋盆的缝合带，组成复杂，它们经历了不同的变质、变形改造，构成了不同构造背景、不同构造层次、不同物质组成、具不同PTt轨迹的蛇绿构造混杂带。

This ophiolitic tectonic melange is composed of some complex slabs from different tectonic settings and structural levels, which underwent different metamorphism with different PTt paths and reworking. The PTt path study in this paper reveals that Sanchazi metagabbro from Mian-Lue Suture zone of Qinling orogenic belt underwent two metamorphic and tectonic stages.

勉略带是近年来秦岭造山带研究中揭示出来的代表晚古生代小洋盆的缝合带，组成复杂，它们经历了不同的变质、变形改造，构成了不同构造背景、不同构造层次、不同物质组成、具不同PTt轨迹的蛇绿构造混杂带。

Through testing 45 carbonate samples collected from PermoCarboniferous caol measures of the Hedong coalfield,the distributions characteristics of carbon and oxygen isotopes in sequences are analyzed,whose feasibilities for sequence subdivision and correlation,as well as for study of relative sea level variations and late Paleozoic facies are also discussed.

系统分析了河东煤田上石炭统（C2）—下二叠统下部（P11）45个碳酸盐岩样品的碳氧同位素在层序中的分布特征，探讨了碳氧同位素应用于层序划分及对比、相对海平面变化研究及晚古生代地层沉积相研究的可能性。

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。