金属的

In the early centuries of our era, however, there gradually developed a mysticism among chemical writers due to Egyptian and Chaldean religious magical ideas, and there developed a fanciful relation of the metals as such to the sun and the planets, and as a consequence there arose the belief that it was necessary to confine the number of metals to seven.

然而在我们时代早期的几世纪里，由于埃及人和占星术宗教人士神秘的想法，在化学作家之间逐渐产生了神秘主义，而产生金属的想象的联系，例如向着太阳和行星，而结果就引发了信仰，认为限制金属的数量为七是必要的。

June 1, 2007, China adjusted the export tariffs on a large area of rare earth metals, refined lead, terbium dysprosium oxide and oxidation of 10% export levy export tariffs, leading to sharp reduction in exports, coupled with the domestic automotive lead-acid battery industry the increased demand for lead metal, lead prices have become push factors.

2007年6月1日，中国作出调整的稀土金属，精炼铅大面积的出口关税，铽镝氧化物和10％的出口征收出口关税，氧化，导致出口大幅减少，加上国内汽车领先耦合酸电池行业的铅金属的需求增加，导致价格已成为推动因素。

Historical research has been carried out to rediscover lost metals of the highest standard and finest finish, from 958 Britannia silver to paktong, a re-discovered metal derived from an 18th-century Chinese candlestick, to Tula steel not used in furniture since the reign of Catherine the Great.

历史的研究已经进行了重新找回失去金属的最高标准，最好的成绩，来自958不列颠白银paktong ，重新发现的金属源于18世纪的中国烛台，以图拉钢没有用的家具，因为统治叶卡捷琳娜大帝。

The application of Inconel 625 on superheater tubes is more complicated because the performance of the cladding depends on the metal temperature reached during operation.

因为金属的表现取决于在操作时，被到达的金属温度Inconel 625的应用在过热器管的是更加复杂的。

Methods A wet hip joint's sample from corpse was scaned by CT and all images of every cross-section hip joint's layer was obtained, and an hip joint's model was contructed with Unigraphics NX 2.0 and Solid Works 2006 SP 0.0 software. The models were assembled when simulated total hip arthroplasty after total hip joint prosthetic and ischiofemoral ligament model had been constructured. Analysis was done on von Mises stress distribution and amount of total hip component when simulated seated leg-crossing manuver. The bone and metal components were meshed as rigid bodies, composed of three-dimensional, all-quadrilateral rigid body elements, and hip joint capsule ligament was fully three-dimensional, hexahedral continuum elements representations. Results The current form of this ischiofemoral ligament's reconstruction finite element model provided for multi-body contact, large displacement interfacial sliding, large deformation capsule ligament representation, and clearly reflected the real ischiofemoral ligansent's anatomy and biomechanical behavior. The maximum on Mises stresses at the joint interface was more than that fur an otherwise identical hardware-only construct.

选择成人尸体髋关节行CT成像得到髋关节每层横截面图像，提取边界坐标，利用有限元分析软件Unigraphics NX 2.0和Solid-Works 2006 SP0.0构建出髋关节三维有限元模型及人工髋关节假体，并模拟全髋置换术进行装配，将坐股韧带按其术中重建位置进行构建骨骼与金属模型采用三维十节点四面体实体单元进行网格划分，关节囊六面体连接单元划分，模拟坐位腿交叉动作载荷获取假体撞击过程的角活动度和相应的von Mises应力分布情况结果所构建的多体连接、大界面划移、大变形的坐股韧带重建有限元模型，客观反映坐股韧带真实解剖形态及生物力学行为，增加坐股韧带重建的模型其关节面的最大主应力值大于仅有金属的模型。

The effect of ion exchange of Y-MCM-41 on the hydrogenation activity of Pd-Pt/Y-MCM-41 in tetralin hydrogenation reaction was examined wit...

结果表明，采用不同离子交换处理的载体所制备的催化剂，其金属的负载量、金属与载体间的相互作用存在差别，从而影响催化剂的加氢活性和选择性。

Ccording to the characters of porous metals, a new effective bulk modulus formula with simpler expression was obtained by considering the heat exchange between the metallic skeleton and air in pore on the basis of phenomenological Biot-Allard model, therefore an extended sound absorption model was put forward.

bstract 根据金属骨架多孔材料的特点，在Biot-Allard刚性骨架多孔材料内流吸声模型的基础上，考虑金属的热导特性，推导出一种新的、形式较简单的有效体积模量表达式，从而得到了一种扩展的吸声模型。

A metal or metal-tipped spear, about2.5 meters(8 feet) in length, used in contests of distance throwing.

标枪一种用于投掷距离的比赛的金属的或带金属尖端的长矛，长约2.5米

Five new solid complexes were synthesized by the coordination of tranisition metals with a Schiff base(C17H21NO,HL) derived from adamantaneamine and salicylaldehyde ,and characterized by elemental analysis,molar conductance,infrared spectra,1H NMR spectra,thermal analysis.

合成了金刚烷胺水杨醛Schiff碱配体(C17H21NO，以HL表示)与5种过渡金属的新的配合物[MCl22]M=Mn(Ⅱ、Co、Ni、Cu、Cd，用元素分析、摩尔电导、红外光谱、1H NMR谱和热重分析对产物进行了表征；讨论了配体与中心金属离子的键合情况，并推测了配合物的结构。

Heat treating of tool steels 工具钢的热处理 The purpose of heat treatment is to control the properties of a metal or alloy through the alteration of the structure of the metal or alloy by heating it to definite temperatures and cooling at various rates.

热处理的目的是通过把金属或合金加热到预定的温度并以不同的速率冷却，来改变金属或合金的结构，从而控制它们的性质。

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。