多晶的

After a longer bias time, it has been observed that polycrystalline diamonds formed as a result of secondary nucleation.

长时间的偏压后，会发现到多晶钻石的形成，推测可能是因为二次成核所造成的。

The uniphase C with W/≤0.3 can be synthesized without being preheated. When W/ is higher than 0.3, the sample expansion increases with the increase of W content, the reaction between W and C is incomplete, the combustion products consist of W〓C, WC, TiC, C, and unreacted W. Preheating mixtures can accelerate the completion of the reaction among Ti, W, and C. The uniphase C with W/=0.4 can be synthesized by SHS at preheat temperature of 600℃. There are two kinds of powders with size of 2-4μm and size less than 1μm in the combustion products.

通过燃烧前沿激冷淬熄试验及产物形貌特征（燃烧块断面组织和产物多晶聚合体颗粒）分析，创新性地提出了两种体系的自蔓延高温反应机制。1熔化—溶解—析出机制：当燃烧温度较高时，燃烧前沿Ti粉熔化，W和C溶解于熔融Ti里，而后C从熔融里析出。2扩散—固溶机制：当燃烧温度不足以使燃烧前沿Ti粉熔化时，通过C的扩散先形成TiC层，其后C沿着热应力导致的TiC层裂纹继续扩散，与固态Ti核反应生成TiC；同时，C扩散至W颗粒，形成W〓C，而后通过C的继续扩散W〓C转变成WC；与此同时，WC固溶至TiC里，形成C固溶体。

He growth process of silver particles with adsorption time is that the reduced silver precursors coalesces into silver particles, branch-shaped silver particles and larger silver pieces, step by step.

EM观察发现：随吸附时间延长，还原的Ag粒从小颗粒状发展到类树枝状的颗粒并最终形成Ag片；相应的电子衍射图也表明，Ag的结晶聚集体形态变化是：无定形→多晶→大银片。

At the solid-liquid reaction stage, the molten Mg promotes the reaction between Mg and residual B powders under the infilteration and enwrapping effects. Finally, the formed MgB2 grains grow up to regular hexagon morphology rapidly by Ostwald ripening mechanism.

在上述工作基础上，同样采用热分析的手段，进一步研究了原位烧结过程中纳米Al2O3粉末掺杂对多晶MgB2相形成过程的影响，并确定了该影响与超导电性之间的内在联系。

The regent took a much less decided stand than his predecessor, and the change soon had its effect on various centres, especially on the Sorbonne, where the sectaries had succeeded in winning over the majority.

丽晶了少得多决定的立场比他的前任，并尽快改变了其对各中心，尤其是在索邦大学，那里的sectaries已成功地赢得了大多数。

In the specially designed experiment, the new spontaneous suspension colloid of diamond with water is discovered, which is not proposed till now.

在一次特殊设计的实验中，首次发现过去从未有人提出过的多晶金刚石与水可在一定时间内保持的自悬浮胶体，并作出初步解释。

In the case of growth on the ploycrystalline diamond substrates under high methane concentration condition, diamond nano-platelets consisting of many smaller tabular crystallites with various shapes but with the same facets, such as trapezoid and parallelogram, appear in terrace and step structure on tabular surface.

在高甲烷浓度条件，多晶钻石基材上成长的奈米平板钻石，其外形结构是由各种形状(近似於梯形及平行四边形)的小平板组合而成，并且这些小平板会在平板钻石表面形成平台及台阶的结构。

In this paper, digital speckle pattern metrology has been applied to the direct observation and measurement of PLC shearing deformation bands. A systematic research, including experimental observation and numerical simulation, on the PLC effect in Al-Cu polycrystals during tension has been carried out at room temperature.

本文将数字散斑计量技术应用于对PLC变形带的直接观测，对室温下多晶铝合金材料拉伸过程中的动态应变时效现象开展了系统性的研究，并结合实验结果进行了数值模拟和分析。

It is concluded that the ~(176)Hf/~(177)Hf ratios of 91500, Temora and We-1 were homogeneous, because the aforementioned Hf isotopic results consist of at least seven separated performances of aliquots for each zircon sample. These results have significant implications for zircon Hf isotopic determination by using LA-MC-ICPMS.

上述每个结果包括至少7组独立的锆石样晶的溶解、分离和测定，表明标准样91500、Temora和We-1是Hf同位素组成均一的，可作为LAM-MC-ICPMS(激光剥蚀多接受器电感耦合等离子体质谱)的原位微区锆石~(176)Hf／~(177)Hf比值分析过程中外部校正及监控标准样。

The results show that the flow stress of both materials decreases with increase of temperature, and strain hardening rates at a temperature below 585 K are greater than that at the temperature above 585 K.

测试结果表明，不论是上引法连铸多晶铜还是连铸单晶铜，流动应力随温度的升高而下降，在温度低于585 K时，材料的应变硬化率明显大于在温度高于585 K时的应变硬化率。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。