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Membrane scaling is caused by the deposition of unsoluble salts as feedwater is converted to brine. In this process the ion concentration of calcium, magnesium and so on increases greatly which will lead to that the ion product of sparingly soluble salts exceeds its solubility product, and the unsoluble salts deposite on the surface of RO membrane to form membrane scaling.

在反渗透海水淡化过程中，由于膜的浓缩作用，浓水中的钙、镁等离子浓度大大增加，从而使难溶盐的离子积大于其溶度积，在反渗透膜表面形成膜垢，影响整个反渗透装置的正常运行，缩短了反渗透膜的使用寿命。

But as she stood with one foot on the loaf and the other lifted up to step forward, the loaf began to sink under her, lower and lower, till she disappeared altogether, and only a few bubbles on the surface of the muddy pool remained to show where she had sunk.

她想保持她的双脚光洁美丽，这自然不能责怪她；可是她来到一片泥泞地，道上有水，有污泥，於是她便把麵包扔到污泥里，她踩在上面走过去，不让鞋子沾上泥水。

The encrust-preventing fluoride coating which deposited on the surface of the pipe of crude oil heating furnace was introduced aiming at the severe encrusting on the furnace.

针对油田加热炉结垢烧损严重问题，采取在加热炉管表面喷涂氟涂层的措施，选取了改性防结垢涂层和传统的氟涂层进行对比试验。

In order to study the aldol condensation of 2,15-hexadecanedione on the surface of aluminium, the intermolecular condensationmechanism of acetone occurring on aluminum was simulated by usingsemi-empirical AM1 method embodied in MOPAC 6.0 program package.

为了研究2，15-十六烷二酮在氧化铝表面的环合机理，选择小分子丙酮为模型化合物，用量子化学半经验AM1方法研究双分子丙酮在氧化铝表面的醛醇缩合机理。

In order to study the aldol condensation of 2.15-hexadecanedione on the surface of aluminium, the intermolecular condensation mechanism of acetone occurring on aluminum was simulated by using semi-empirical AM1 method embodied in MOPAC 6.0 program package. The optimized structures and geometry parameters of 5 transition complexes and 4 intermediates were given.First, 2 molecules of acetone coordinated with aluminum by electrostatic attraction.One atom of hydrogen of acetone migrated to aluminum because of t...

为了研究2，15－十六烷二酮在氧化铝表面的环合机理，选择小分子丙酮为模型化合物，用量子化学半经验AM1方法研究双分子丙酮在氧化铝表面的醛醇缩合机理，给出了反应过程中的5个过渡态和4个中间体的结构和几何参数，该催化反应可以认为是氧化铝分子与两分子丙酮分子发生静电络合作用，然后借助氧原子的负电荷导致脱氢并实现缩合，根据中间体的能量变化，推测有较稳定的铝复合物生成。

Co-firing characteristics of corn stalk and stone coal in different proportion were investigated by thermal gravimetric analysis. The results showed that corn stalk can improve the ignition and combustion of stone coal. The agglomeration experiments on corn stalk were made in a bench-scale bubbling fluidized bed with quartz sand as bed material and stone coal ash as additive. The results indicate that stone coal ash can inhibit agglomeration of bed material particles at temperature of 900℃. Agglomerate of blends was analyzed by means of scanning electron microscopy, energy-dispersive X-ray, and the bed materials were analyzed by means of X-ray fluorescence. Analysis showed that aluminum element and iron element in stone coal ash can react with alkali compounds and eutectics with low melting point, form a covering layer with high melting point on the surface of biomass and quart sand particles, thus inhibit the forming and transfer of low melting compounds.

以玉米秸秆与石煤按不同比例组成的混合物为研究对象，在TG-DTG热分析仪上进行了燃烧特性分析，结果表明玉米秸秆有利于石煤的着火和稳定燃烧，对石煤有一定的助燃作用；在小型鼓泡流化床实验装置上，以石英砂为床料、石煤灰为添加剂，进行了玉米秸秆成型燃料流化床燃烧的床料黏结实验，结果表明：石煤灰能够在生物质流态化燃烧过程中有效地抑制流化床床料黏结现象的发生；通过对实验中形成的结团进行扫描电子显微镜X射线能谱(scanning electron microscopy/Energy-dispersive X-ray- SEM/EDX)，对床料进行X射线荧光光谱(X-ray fluorescence，XRF)分析，结果表明石煤灰中的Al和Fe能够与生物质灰中的碱金属化合物以及低熔点共熔物发生化学反应生成高熔点物质，并且覆盖在生物质碳颗粒与石英砂颗粒表面形成隔绝层，从而阻止低熔点物质的生成与迁移。

Improved to the careless use of Silicone Grease, Silicone Grease result is usually improved by adding carbon (such as pencil refillable powder) and the metal powder, when the conductive Silicone Grease with the ability to run on the computer to the CPU when the percolation capacitance on the surface of the consequences would be unthinkable and the slot.

改良的硅脂更要小心使用，因改良的硅脂通常是以加入碳粉和金属粉末，这时的硅脂有了导电的能力，在电腦运行时渗到CPU表面的电容上和插槽後果不堪设想。

The common analytical method is to hypothesize the adsorption orientation, geometry configuration and adsorption essence of adsorbates on the surface of substrates based on the shift of Raman bands, enhancement or weakness of intensity.

传统的分析方法是根据拉曼峰的频移以及拉曼峰的增强或减弱来猜测吸附物吸附在基底上的吸附取向、几何结构和吸附的本质，等等。

If corpuscles fall on the surface of glass, for example, it may be that a force is exerted on them by the particles of the matter, a force which strangely enough acts only in the immediate neighbourhood of matter.

如果作用在光的微粒上的力是垂直于玻璃表面的引力，那么光束新的运动路线将会在原来的路线与垂直线之间。

When the output power of the CO_2 laser machine reaches 100 W on average, the round focusing point can be formed on the surface of glass by the focusing light path.

CO2激光器平均输出功率为100W时，通过聚焦光路在玻璃表面形成圆型的聚焦点。

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。