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The mechanism of dispersion fluidization effect of ACS on cement particles was discussed.

研究了丙烯酸接枝共聚型高效减水剂ACS对水泥浆产生分散-流化作用的机理。

Nano-agglomerate fluidization technology can be applied not only to fluidize nano-particles, but also to fluidize other dimensional nano-powders.

纳米聚团流态化利用粉体团聚特性使得流态化技术不但可以应用于纳米颗粒体系，而且完全可以推广应用于其它维数的纳米粉体。

Due to the difficulty of direct measurement of collision force between small particles, an indirect approach to the measurement by applying PTV technology is developed. The visualized fluidize bed based on microphotography and sheet light source is set up to extend the above approach to practical usage.

针对微细颗粒间微小碰撞力无法直接测量的困难，本文发展出一种基于PTV可视化技术的碰撞力间接测量新方法，同时检验了以上理论成果，并进一步开发了显微摄像和普通光片光源以适用于实际流化床内的碰撞规律研究。

According to the classifing method of Geldart,ultrafine powders belong to group C particles.It is difficult to fluidize because of such cohesiveness.However,it was discovered recently that some powders can be fluidized smoothly through forming larger agglomerates at high gas velocity,and the fluidization quality of some powders can be improved by external force.

按Geldart的分类法，超细粉属难流化的C类颗粒，但近年来的研究表明，某些超细粉在高气速下可以形成较大的聚团，而以聚团形式实现平稳流化；对在高气速下难以流化的超细粉，人们通过引入外力场等方法来改善其团聚特性，提高流化质量。

It is shown that the porous particles are less energyconsuming to fluidize and, with their contents varying from 5%～25% in the riser, the minimum fluidization velocities based on gas stream are from 0.87×10-3 m/s to 2.2×10-3 m/s, while the critical transport velocities are from 1.0×10-2 m/s to 1.6×10-2 m/s for the operation with no liquid circulation or from 5.2×10-3 m/s to 7.1×10-3 m/s for the condition with liquid circulation.

例如，流化床电极、造粒、砂滤、结晶、浮选、聚合、煤气化、费-托合成[1]等。废水处理中三相流化床的应用得益于生物工程中的生物膜法和化工操作中的流态化技术的成功结合，主要优点为宏观混合程度高，固相内扩散阻力低，液体和固体外部传质阻力小，微生物浓度高。

A new ceramic containing fluorapatite and small particles of glass is being used to replace teeth. This ceramic material has the aesthetic look of a natural tooth and causes less wear to opposing teeth than other available materials. Research is even being done on a "ceramic" based gum which is thought to retard the growth of plaque.

一种新型的含有氟磷酸钙以及玻璃小颗粒的陶瓷正用于替代牙齿，用这种陶瓷制成的牙齿，有着和天然牙齿一样的外表，并且具有比由其他用于制作假牙的材料更好的耐磨性，研究人员也正在研制一种陶瓷基牙龈，以阻碍牙菌班的生长。

They observed the deflections of the particles by allowing them to fall on a fluorescent screen .

他们让粒子落在荧光屏上以观察他们的偏移。

Fluorescent particles can be used when maximum sensitivity is required.

荧光微粒时可以使用的最高灵敏度是必需的。

The fabrication of SiNW was used by "electroless etching" which was when (100) c-Si was immersed in the solution containing silver nitrate and hydrofluoric acid. Si was etched by fluoric ion and released electrons to combine with silver ion to form Ag particles.

制作矽奈米线阵列的方式为无电镀蚀刻法，系将一p-type(100)之矽基板置入氢氟酸与销酸银的混合蚀刻液中，当溶液中之氟离子与矽基板接触后，矽即被解离成矽离子并放出一颗电子。

Let's say that the 'average' mother has one half ounce of foremilk (the thin, sweet milk produced at the beginning of the feeding that is high in lactose but lower in fat) and two ounces of hindmilk (the higher calorie, thicker milk that is produced as the milk lets down and moves through the ducts, collecting fatty particles).

我们通常认为一般情况下，妈妈有0.5盎斯的前奶（宝宝每次吃奶时先吃进去的比较稀且甜的，高乳糖低脂肪的乳汁）就会有2盎斯的后奶（随着奶阵的到来产生的富含脂肪的比较稠的乳汁）。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。