查询词典 oceanic trench

The early stage of me tamorphism happened before deformation in the upper mantle at about 60-70km. Then metagabbro emplaced rapidly at about 40 km by diapirism and perhaps amalgamated with cool subducted oceanic crust. After that, rapid cooling retrograde metam orphism occurred. Early rapid ocean spreading was constrained because subduction appeared. Therefore, metagabbro continued to uplift under the slow extension. At last, it obducted and thrusted to outcrop on the surface.

变形前的早期变质可能发生在60～70km处的上地幔，然后变质辉长岩快速"底辟"构造侵位，上升至约40km深处，可能与俯冲的冷洋壳并置，发生快速降温退变反应；因俯冲作用的开始，抑制了洋盆快速扩张，变质辉长岩在减速伸展环境下继续抬升减压；后期又由于仰冲推覆，最终出露地表。

By coordinate transformation,specifically,by using orthogonal coordinate system to obtain vertical high resolution ratio in superstratum water of Beibu Gulf and making use of Sigma coordinate system to match terrain in bottom water,the authors intend to set up Beibu Gulf Physical Oceanic Model and use the model to simulate partial tide M\-2,partial tide K\-1 and partial tide O\-1 respectively.

采用坐标变换方法，在北部湾上层海洋采用正交坐标系以获得垂向高分辨率，在底层水体采用 Sigma坐标系以拟合地形，建立北部湾的物理海洋模型，并利用建立的模型分别模拟北部湾的 M2 、K1 、O1 分潮。

Methods We searched the EI database (1969 to 2005), OVID database (1966 to 2005), Superstar electronic library and some websites such as Federal Emergency Management Agency, National Oceanic and Atmospheric Administration, and Centre for Disease Control and Prevention.

计算机检索EI数据库（1969～2005）、OVID数据库（1966～2005）、超星电子图书馆、官方网站如联邦紧急事务管理局、美国国家海洋与大气管理局和疾病预防控制中心等。

Despite this solution, the volume of accumulated oceanic pelagic carbonate is staggering because of the size of the oceans

尽管有这种溶解作用，但由于海洋的巨大体积，深海碳酸盐的堆积量仍然是令人惊愕的。

Base on above studies, some conclusions were obtained as follows:(1) ore-forming background of the studied ferromanganese crusts are mainly controlled by intensity of Antarctic Bottom Waters and variations of material source;(2) it is confirmed that the ferromanganese crusts are mainly hydrogenetic and their composition are affected by volcanic and continental material simultaneously; there are no obvious phosphatization reconstruction and element reaction occurred in them, so they have important paleoceanological significance;(3) from researches on element occurrence modes in the new-type ferromanganese crusts and the lying sediments, it is proposed that there is no great biological affection on the crusts formation and their composition mainly came from the adsorptive action of the ferromanganese oxides in them;(4) two major types of ore-controlling factors are identified through compilation of ore-controlling factors, which are geological and oceanic factors;(5) considering the long-term variation trends of the crusts composition, combing the U-series and 10Be isotope dating results, it is proposed that the ore-forming processes of ferromanganese crusts in the studied areas can be divided into three major stages (5.6~2.8 Ma, 2.8~2.7 Ma and since 2.7 Ma), and then the activities of AABW since the Late Miocene, changes of input flux coming from volcanic and continental material are confirmed.

通过研究，得出如下结论：(1)研究区铁锰结壳的成矿背景主要受控于南极底流强弱及物源供给的变化；(2)证实铁锰结壳主要为水成成因，同时其物质组成也受一定程度的火山和陆源物质的影响；结壳自形成以来没有遭受到明显的磷酸盐化等成岩后期改造和元素再迁移，具有重要的古海洋学意义；(3)通过新型铁锰结壳及下伏沉积物元素赋存状态的研究，认为生物作用对研究区结壳的形成并没有很大的直接影响，其物质成分主要来自于结壳中铁锰氧化物的吸附作用；(4)在控矿要素的研究中，归纳出了地质与海洋两大类结壳控矿要素；(5)根据结壳成分长周期变化趋势，结合铀系和10Be测年结果，将研究区结壳的形成过程划分为三个主要阶段(5.6~2.8 Ma，2.8~2.7 Ma和2.7 Ma以来)，并确定了晚中新世以来研究区南极底流的活动情况、火山和大陆来源物质输入量的变化。

And the late Triassic bimodal association reflects the characteristics of intracontinental rift setting, the early Jurassic Raohe ultramafic - mafic rock - pillow lava association represent the environmental characteristics of oceanic island, magmatic arc association represent the characteristics of island arc and active continental margin with the background of the plate subduction, middle Jurassic syn-orogenic granodiorite-granite association reflects characteristics of matching and orogensis after continental accretion.

其中晚三叠世双峰式组合反映了板内裂谷成因特征，早侏罗世饶河超镁铁质-镁铁质岩-枕状熔岩组合代表了洋岛环境特征，岩浆弧火成岩组合代表了板块俯冲背景下岛弧和活动大陆边缘特征，中侏罗世同造山花岗闪长岩-二长花岗岩组合反映了陆缘增生后拼贴造山的成因特点，它们总体上代表了由被动陆缘裂向活动陆缘转化并最终发生陆缘增生带拼贴造山的一个演化过程，其间伴随有被动陆缘深海盆地沉积、活动陆缘弧后前陆盆地沉积和陆相类磨拉石建造

Considering the properties of hydrate formation, the designing principle of drilling fluid was provided. Based on this, a new polyalcohol drilling fluid for oceanic hydrate formations was formulated. The performance of this drilling fluid was evaluated by shale hydration inhibiting test, low-temperature rheological property test, and gas hydrate formation inhibiting experiment.

针对海底天然气水合物地层及其钻井的特性，给出了钻进海底天然气水合物地层时钻井液体系的设计原则，根据此原则在充分考虑现有常用聚合醇钻井液体系特点的基础上，设计了一种适合海底天然气水合物地层钻井的新型聚合醇钻井液，并对其页岩水化抑制性、低温流变性和水合物生成抑制性进行了评价。

In this paper, we purifid vitellogenins of red drum and genuine porgy which are two kinds of widely distributed oceanic fish, and study their electrophoretic compa.

本文选择两种海洋鱼类美国红鱼和真鲷，进行卵黄原蛋白的分离纯化和电泳性质研究，并针对国内广泛使用的农药久效磷，以美国红鱼幼鱼为模型生物，以VTG的产生建立有机磷农药内分泌扰乱效应的筛选体系。

Sea ice severe degree and disaster in Bohai Sea from 1950 through 2007 promulgated by State Oceanic Administration People's Republic of China has been summarized. According to these reports and bulletins involved with sea ice severe degree and disaster, the statistical means of 5-year moving average are applied, the feedback of sea ice disaster to the societal activity in every National Five-year Plan has been exhibited, the relation between sea ice disaster and sea ice severe degree has been quantificationally analyzed. Some conclusions have been derived as follows: sea ice disaster appeared proportionably to industrial activity and sea ice severe degree, but inverse proportionnably to the understandings of cognition of defending in sea ice disasters; so that the weaken sea ice conditions could not inevitably result in the loosening of sea ice disaster.

通过归纳整理1950年以来渤海海冰冰情等级以及国家海洋局公报内的海冰灾害，并应用五年滑移平均，以反映中国"五年计划"的社会活动与海冰灾害之间的响应，定量分析海冰灾害发生率同海冰冰情等级的关系，发现工业活动的频繁程度同海冰灾害发生率成正比；人类重视程度同海冰灾害发生率成反比；海冰冰情等级与海冰灾害发生率成正比；当海冰冰情等级减轻时，海冰灾害发生率并不一定减少。

Small to medium evergreen dioecious trees of oceanic climates: puka .

海洋气候半熟的长绿的雌雄异体的树林一小部分；普克珠贝。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？