旋回

Four stages of granitoid plutonism took place in Precambrian, early Paleozoic （∈-D3）, late Paleozoic-early Mesozoic （D3-T3）, and late Mesozoic-Cenozoic, respectively.

该带内的花岗岩形成可以划分为4个时段，分别与4个造山旋回相对应：前寒武纪；早古生代；晚古生代—早中生代；晚中生代—新生代。

These cycles plus two first-order cycles in the Phanerozoic successions have disclosed that a genetic link may be postulated for individual Earth shells and galactic precessional cycles.The stratigraphic records of the above-mentioned cycles are significant especially for the division of the Precambrian strata with lower stratigraphic resolutions.

尽管对地层记录中隶属不同级别沉积层序的间断面所代表的间断时限的绝对年限还难以精确估价，而建立在岩相及相序基础之上的旋回性地层记录的研究，是从复杂而不完整的地层记录中寻找出更多规律性的有效途径，特别是对生物地层分辨率不高的前寒武纪地层，尤其显得更加重要。

Two chloride profiles of unsaturated zone at piedmont plain of Taihang Mountains suggestedthat there are three climatic cycles showing the cold-dry or wet-warm conditions over the psat 300years.

太行山前的两个包气带剖面氯含量变化记录说明：过去300年来该区古气候存在三次干湿变化旋回，湿期分别是公元1702-1725年，1761-1825年，1876-1892年。

The main two cycles of the Xiangshan volcanic rocks and subsequent subvolcanic rocks have low ε〓 value (-7.46～-9.40), high initial 〓Sr/〓Sr ratio (0.70801～0.71201), old Nd model ages (1.54～1.70Ga) and relatively riched in radiogenic Pb.

相山两旋回火山岩及火山期后的次火山岩具有较低的ε〓值(-7.46～-9.40)、较高的I〓值(0.70801～0.71201)和较古老的Nd模式年龄(1.54～1.70Ga)，且相对富集放射成因铅。

The evolution of sedimentation of South China plate in the Hercynian Indosinian stage can be divited into five substages from its occurrence to subduction, which corresponds to Ⅱ cycle of the relative sea level change, and the Dongwu movement is the turning point, which took place between the Early and Late Permian.

华南板块在海西—印支期的沉积演化，可以分为从发展到消亡的五个亚阶段，并和海平面相对升降的Ⅱ级旋回相当，早晚二叠世间的东吴运动是这个阶段由发生到衰亡的转折点。

Fully considering the factors of structure, deposition, transforming system and Reservoir Forming Dynamics and so on, the paper thought that the reservoirs in Xiakou fracture zone belong to hydrocarbon remigration and secondary accumulation mode, the configuration relationship between the sands and faults is the main factor that affects hydrocarbon migration; reservoir gathers in the central upheaval zone belong to event hydrocarbon migration and accumulation mode, it can be divided into three styles, they are the fracture activity event mode, the volcanic activity event mode, he gravity flows event mode. The key factors of resulting in event reservoir are fault cyclicity and episodic characteristic.

充分考虑构造、沉积、输导体系和成藏动力等因素，分析认为：夏口断裂带油气藏聚集属于油气再运聚成藏模式，连通砂体与断层的配置是影响油气运移的主要因素；中央隆起带油气藏聚集属于油气事件成藏模式，划分为断裂活动事件成藏模式、火山活动事件成藏模式和重力流事件油气成藏模式三类，断层活动的旋回性和幕式性是诱发事件成藏的关键因素。

Objective To evaluate the single-shot TSEtechnique in eliminating artifacts of motion in MRI of brain.

目的 探讨单次激发快速自旋回波序列在消除头部MRI运动伪影的应用价值。

Objective:To evaluate the clinical application of single-shot sequences MR cholangiopancreatography.

目的：探讨单次激发快速自旋回波序列磁共振胰胆管造影的临床应用价值。

Comparison of the last glacial cycle recorded Lanzhou loess profile and ice corefrom Eastern Station of South Pole.

未次冰期旋回兰州黄土剖面与南极东方站冰芯的对比。

Based on the high resolution sequence stratigraphical theory, this paper analyzed the variety of base level cycles and its control on the development and evolvement of Dongying delta. Its high frequency sequence stacking mode is divided into three types.

以高分辨率层序地层学理论为指导，分析基准面旋回变化对三角洲发育演化的控制作用，将三角洲发育过程中的高频层序叠加样式划分为3种类型。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐