汽

They sing by striking their flippers against their chests to hit their pharyngeal pouches, balloon-like extensions of the trachea that are unique to Odobenus and that also serve as flotation devices.

它们用鳍拍胸膛，打击咽囊，也就是气管的延伸，状似汽球，是海象独有的特徵，同时也有漂浮的作用。

Several decades of patent technology have been applied to the products, forming more than a dozen of series of product such as thermal oiI heater, condensing boiler, injection steam boiler used for oil fields, residual heat boiler, Grade A parts etc with almost one hundred of specifications.

山东圣威新能源有限公司是山东圣威集团公司下属的全资子公司，成立于1993年，长期致力于环保、节能领域的可持续发展，自主研发出具有国际领先水平的产品，有几十项专利技术应用在产品中，构成导热油炉、冷凝式锅炉、油田注汽炉、余热锅炉、A级部件等十大系列，近百种规格。

According to the problem of outlet leakage of propane on the propane pump mechanical seal in the olefine factory of Qilu petro-chemical company, the new-type assembling non-contacting mechanical seal for propane pump was developed firstly on the basis of the principle of non-contacting of mechanical seal .

针对齐鲁石化公司烯烃厂丙烷泵机械密封频繁出现汽喷现象、密封端面泄漏严重的问题，根据非接触式机械密封原理，研制开发出了丙烷泵用新型非接触式机械密封。

Study result suggest: The change of stock in RFCCU directly affect gasoline content. Gasoline content can be reduced through increasing the equilibrium activity of catalyst, controlling reaction level, increasing recirculating rate of gasoline and stability of gasoline level. Conclusions drawn from experiment is that optimization of operating condition has great effect on lowering olefine content of gasoline which can be reduced from 60% to 50%.Reducing reaction temperature is useful for lowering olefine content of gasoline, when the reaction temperature is raised, thermal cracking rate is higher than catalytic cracking rate, so that olefine content is increased. Raising catalyst-to-oil ratio is good for lowering olefine content. With conversion rate increased, the yield of LPG and coke is raised, the yield of gasoline is increased firstly and then decreased slightly, hydrogen transfer index is increased, so the olefine content is decreased.

研究结果表明：催化裂化装置的原料的变化直接影响到催化汽油的烯烃含量；可以通过优化催化装置的操作条件来降低催化汽油中的烯烃含量，其中通过提高催化剂平衡活性、控制反应深度、增加汽油回炼量、汽油深度稳定可以降低催化汽油烯烃含量，优化工艺条件对降低催化汽油烯烃含量有较大作用，汽油烯烃含量由60％降至50％左右；降低反应温度有利于降低催化汽油的烯烃含量，当反应温度的提高，热裂化反应速度提高的幅度大于催化裂化反应速度提高的幅度，汽油烯烃含量增加；剂油比的提高有利于降低催化汽油的烯烃含量，转化率提高，液化气产率提高，汽油收率先增加后略有下降，焦炭产率增加，氢转移反应指数提高，汽油烯烃含量下降；反应时间对产品分布及汽油烯烃含量有影响，增加提升管反应时间，液化汽、汽油产率提高，干气和焦炭产率增加。

Key Word petrochemical industry , refining-chemical integration ,olefine ,sythetic gas ,alkane activation ,separation ,reaction ,biochemlcal ,nanotechnology , informatiom technology

炼油厂的汽柴油规范将进一步强化，欧盟汽油含硫将从2000年150PPm减小到2005年50PPm、2011年10PPm，芳烃含量将从2000年42%减小到2005年35%，汽油中芳烃将寻求石油化工新用途。

Aimed at the over proof problem of dissolved oxygen in condensation water for 300 MW units, a great deal of tests have been made, this paper deals with the effects of feed water pump sealing water, seal steam heater drain water, overcool degree of condensation water , and condenser makeup water, and puts forward some effective improving measures.

针对某电厂300MW机组凝结水溶氧超标的问题，进行了大量的试验研究，提出了给水泵密封水、轴加疏水、凝结水过冷度以及凝汽器补水等对凝结水溶氧量的影响，并对此提出了一些行之有效的改进措施。

The perfect balance between lightness and crystalline purity makes Acqua Panna noble and unique, and the perfect complement to S.Pellegrino sparkling mineral water.

轻盈质感和水晶般的纯净感之间的完美平衡成就了普娜矿泉水的高雅和独特，也是圣培露汽矿泉水的完美补充。

Nanjing Fiat will stop operation in 2008. And its four models including Palio and Perla will be produced in Nanjing Automobile.

南京菲亚特将在2008年停止生产运作，之后，包括派力奥和派朗在内的4款现有车型将投身南汽，并重新挂牌进行生产。

Aiming at the quality of copper(HSn-70A),the corrosion inhibition capacity of single PESA is studied. Its composite prescription is developed. The optimum composite scheme is selected as 10 mg/L PESA+ 0.5 mg/L BTA+2 mg/L Zn2++ 10 mg/L sodium gluconate. The corrosion rate of copper is only 0.000 5 mm/a under this condition.

针对凝汽器铜材质(HSn-70A)研究了单一聚环氧琥珀酸的缓蚀性能，开发了与之复配的复合配方，筛选出的最佳复配方案为10 mg/L PESA＋0.5 mg/L BTA＋2 mg/L Zn2+＋10 mg/L葡萄糖酸钠，在此条件下铜的腐蚀率仅为0.000 5 mm/a。

With the increase of growth rate, the photoelectrical properties of such films were greatly decreased.

化学汽相沉积微晶硅薄膜过程中，为了减低成本，必须提高沉积速率，但是，薄膜的微观结构和光电性能则会降低。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。