先驱的

Here we used ferrocene , xylene and argon as the catslyst precursor, carbon source and carrier gas, and used alundum tube as reaction chamber.

以二茂铁、二甲苯、氩气分别为催化剂先驱体、碳源、载气，直径100mm的刚玉管为反应室，石英玻璃为基底，催化热解制备定向碳纳米管。

Anglo-Saxon is the forerunner of modern English.

盎格鲁撒克逊语是现代英语的先驱。

Anglo-Saxon is e forerunner of modern English.

盎格鲁撒克逊语是现代英语的先驱。

In present work, pyrolysis behavior of several preceramic polymers was studied, and various physical and chemical changes which took place while the preceramic polymer-filler systems were being reaction pyrolyzed were investigated, then phase composition, microstructure and properties of the multiphase ceramics were characterized

本论文在单独研究了几种聚合物先驱体的热解行为的基础上，对多个聚合物先驱体+充填剂体系的反应热解过程中的各种物理、化学变化作了深入探讨，继而研究了由此制备的复相陶瓷的相组成、显微结构和性能的形成和变化规律。

In Indonesia, PT Bumi Resources' higher revised A$ 504.1 million (US$ 484 million) counter bid for Herald Resources (its existing takeover bid was for A$ 445 million) has now been trumped by a higher revised joint counter bid of A$ 524 million (US$ 503 million) from Indonesia?s Antam (PT Aneka Tambang which owns 20% of Herald?s Dairi project) and China?s Shenzhen Zhongjin Lingnan (a leading Chinese zinc/ lead producer).

在印度尼西亚，PT Bumi资源公司将收购澳大利亚先驱资源公司的价格提高到了5.041亿美元，低于印尼Antam公司（PT Aneka Tambang公司持有先驱资源公司旗下Dairi项目20％的股份）和中国深圳中金岭南公司（中国一家领先的锌/铅生产商）提供的5.24亿美元的联合报价。

The PCS fibers at the dose of 0.5MGy are infusible in the process of sintering, at the dose of 3.0MGy the gel content and ceramic yield are 75% and 85.17%, respectively.

吸收剂量为0.5MGy时，PCS先驱丝在热解过程中没有并丝；吸收剂量为3.0MGy时，PCS先驱丝的凝胶含量和陶瓷产率分别达到75%和85.17%。

The results indicate that polyborazine precursor prepared at 150℃ for 10 h and propylamine/isopropylamine molar ratio 2:1, could possess nearly linear molecule skeleton and he prone to melt spinnability. When melt at 90℃, the precursor fibers are prepared with average diameter 10-20μm and BC1.27 N1.52 H structure. After curing process and sintered in NH3 at 1200℃, the near-stoichiometric BN fibers was obtained, which proved this precursor is apt for preparation of BN fibers.

结果表明，当正丙胺／异丙胺摩尔比为2：1，聚合温度为150℃，反应时间为10h时，合成产物具有近似线性分子结构，熔点为90℃，具有良好的成丝性，可获得平均直径10~20μm，组成为BC1.27N1.52H的先驱体纤维，先驱体纤维再经不熔化处理及1200℃氨气高温锻烧等工艺可获得近化学计量比的氮化硼纤维。

A direct method to prepare nanometre catalyst of positive electrode for methyl alcohol fuel battery is to add strong oxidant to a mixed solution of manganese nitrate and some other metal nitrate, to coat them on the graphite electrode to have catalyst precursor produced, then to prepare the non-platinum nanometre catalyst of metal ion-doped manganese dioxide with carbon as a carrier by thermolytic reaction of the in-situ precursor. The prepared catalyst has the advantages of high electrical catalytic activity of methyl alcohol, high performance to protect against CO poison and low price, and it can lower the battery manufacturing cost effectively as well as can raise the entire electrical property of the battery so that the price performance and the market competitive edge of the battery are enchnaced effectively.

一种直接甲醇燃料电池阳极纳米催化剂的制备方法是在硝酸锰和其它金属硝酸盐的混合溶液中加入强氧化剂，涂抹于石墨电极上制成催化剂先驱体，通过先驱体在原位的热分解反应来制备以碳为载体的金属离子掺杂二氧化锰非铂纳米催化剂；制得的催化剂具有高的甲醇电催化活性、高的抗CO毒化性能以及低廉的价格等优点，可以有效地降低电池的制造成本，提高电池的整体电性能，从而有效地提高直接甲醇燃料电池的性能价格比及市场竞争能力。

Each place a lightning bolt zigs or zags is where one leader stopped and another one started.

闪电弯曲的地方是前一个&先驱&停止另一个&先驱&开始的地方。

The epoxy-based second-order NLO polymer was synthesized through the coupling reaction between p -nitrophenyl diazonium salt and an epoxy-based precursor polymer,which was prepared by the polycondensation of diglycidyl ether of bisphenol-A and aniline Bi-component (BPAN-lA-NT/M2OS) thin films were prepared by spin-coating from the solution of BPAN-lA-NT mixed with certain amount of a cross linking agent M2OS.

通过双酚A-二与苯胺的逐步聚合反应合成环氧树脂类先驱聚合物BPAN ，进一步通过先驱聚合物的后重氮偶合反应，制备了侧链带偶氮生色团的二阶非线性光学聚合物BPAN-1A-NT。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。