合成

Aragonite at 0 to 70℃ was synthesized by slow decomposition and "two step" overgrowth approaches.

采用缓慢分解法和"两步法"的附晶生长法，在低温(0℃～ 70℃)下实验合成纯文石型碳酸钙矿物，以XRD和SEM技术对合成矿物的相组成和形貌进行了鉴定。

This article reviewed the current situation of the MAS of aromatic esters and prospected its future development.

该文综述了微波辅助合成芳香酯的研究进展，并展望了微波技术在芳香酯合成中的发展前景。

Brought up as a Field Artilleryman,his duty positions include Commanding General of the US Army Combined Arms Command Fort Leavenworth/Deputy CG, US Army Training and Doctrine Command for Combined Arms, Fort Leavenworth, Kansas; CG, 3rd Infantry Division, US Army Europe and Seventh Army; Director of Force Development,Office of the Deputy Chief of Staff for Operations and Plans, US Army,Washington, DC; Director, Army Airland Battle Deep Attack Programs Office, and Deputy Chief of Staff for Operations and Plans, US Army, Washington, DC; and Director of Studies and Analysis, Office of the Deputy Chief of Staff for Combat Developments, TRADOC, Fort Monroe,Virginia.

他是一名与生俱来的野战炮兵，他曾经担任的职位包括：肯萨斯州莱文沃思堡美国陆军合成兵种司令部的将军级指挥官；肯萨斯州莱文沃思堡美国陆军训练与条令司令部负责合成兵种的副将军级指挥官；美国驻欧洲陆军和第七集团军第三机械化步兵师的将军级指挥官；华盛顿特区美国陆军副参谋长办公室负责作战与计划的部队发展主管；华盛顿特区美国陆军机降作战纵深攻击项目办公室主管，和负责作战与计划的副参谋长；弗吉尼亚州门罗堡训练与条令司令部负责作战开发的副参谋长办公室研究与分析主管。

OBJECTIVE: To study the cellular activity of asparagine synthetase in different types of childhood acute lymphoblastic leukemia.

目的：不同类型急性淋巴细胞性白血病对左旋门冬酰胺酶敏感度不完全相同，由于LAsp活性水平与细胞内门冬酰胺合成酶活性负相关，因此研究不同类型ALL患儿白血病细胞内门冬酰胺合成酶活性水平分布情况，有助于临床治疗中合理使用LAsp。

To check up the analytic solutions, we calculate the N distributing of the heavy element of s-process in Solar System and the result is good agreement with astronomic measurement.

重元素的核合成中最重要的因素之一是中子源问题，稳定的中子源是重元素的核合成必要保证。

Chiral amino-hydroxy compounds have been proved to be a very efficient class of ligands in a variety of catalytic asymmetric syntheses and chiral auxiliary synthesis catalyzed by metallic ions.

手性氨基-羟基化合物是一类用于催化不对称合成和手性辅助合成的重要配体。

Asymmetric synthesis is one of the most important parts in organic synthesis.

不对称合成是有机合成化学领域的重要研究内容之一。

Asymmetric organic synthesis is one of the most attractive research areas in organic synthesis.

不对称有机合成是当代有机合成的最具有吸引力的领域之一。

The results show different factors in this process such as reactant ratio, atmosphere pressure etc.

结果表明，反应物投料比例，合成气氛压力等因素对合成产物化学计量配比有显著的影响。

Sol-gel Autoignition Synthesis, simple, self-cleaning and easy to undertake scale production, is the one of the prospective routes for manufacturing barium titanate powders.BaTiO3 nanopowders with the particle size 20-90nm, specific surface area 15m2/g, fine particle distribution, ratio of Ba/Ti 1.002 and with the dielectric constant more than 3000, were synthesized by SAS BaTiO3-TiCl4-ammonia-citric acid system.

本文自己组装的溶胶凝胶自燃合成系统，利用对Ba(NO_3)_2-TiCl_4-柠檬酸-氨水体系进行自燃合成研究，制备了具有纳米尺度的近球形BaTiO_3颗粒，粒径介于20-90nm之间，比表面积15m~2／g，分布范围较窄，Ba／Ti为1.002，器件介电常数最高达3000多。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失