上壳

Based on the Lagrangian equation with dissipation function, the motion equation of a microbubble with shell is obtained, and the dynamic characteristics of microbubble with shell in free space are studied. It shows that the inner and outer maximum radii of the microbubble increase when the acoustic pressure and its initial radius increase, as well as when the ultrasonic frequency decreases.

理论上利用有耗散函数的Lagrange方程，建立了有壳微泡的R运动方程，开展了自由空间中有壳微泡动力学特性的研究，表明微泡内外半径增量随声压的增大、超声频率的降低、初始内径的增大及壳厚的减薄而迅速增大。

The pressure hull is an important element of submarine structure which can withstand the external pressure, the pressure hull is composed of cylinder and dome for the most part, and needs to weld stiffeners on the cylinder within a moderate space.

潜艇在水中主要由压力壳来承受水压，而小型潜艇之压力壳大都由圆筒壳及半球型壳组合而成，并在圆筒壳上之适当距离焊接环状肋骨作为补强。

Shell Shock is an engrossing account which reveals details that have never been included in any company accounts.

壳牌伤害了自己也坑害了他们的股东。《壳牌危机》讲述了全球最有威望的大企业的精彩故事，揭开了壳牌公司的层层内幕，披露了很多从未在企业帐户上显露过的惊人细节。

Shell Shock then exposes the company's appalling environmental record, notably in Nigeria and the United States, and reveals the possible ecological consequences of current plans to extract oil from Sakhalin Island, off Russia's Pacific coast.

壳牌危机》以时间顺序完整地记录下了壳牌公司在世界各地的经营活动，披露了该公司触目惊心的环保记录：他们大肆掠夺了尼日利亚土族人的土地，破坏了美国各个社区的生活环境，也揭露了壳牌公司的最新计划：他们打算开发俄罗斯境内的太平洋沿岸上的库页岛上的石油，这一规划将进一步破坏生态环境。

Outstanding performance: when your car fitted with a balanced strengthening of bar buttons, shell shock machines and cars formed between the steel beam structure, a more rugged, less car shell of metal and resonance damping components, thereby reducing the resonance generated by the noise, to avoid the car before the shock absorber parts of the shell due to the weight of the engine so that metal fatigue or impact, etc., causing distortion and eliminate tire wear caused by vehicle deviation of the hidden dangers, so that the body is more stable equilibrium.

表现出色：当你的爱车装上平衡加强杆扣，减震机与车壳之间形成钢梁结构，更加坚固无比，减少车壳金属与减震部件的共振，从而降低因共振所产生的噪音，避免车壳前减震部位因引擎重量使金属疲劳或撞击等造成变形，消除车辆跑偏磨胎所带来的隐患，令车身更加稳定平衡。

The nonlinear dynamic behaviors of a single layer reticulated spherical shell were investigated.

重点研究了单层球面网壳的非线性动力回应行为，对网壳结构在地震作用下的动力失稳状态以及倒塌现象作了理论上的研究，为"结构倒塌"作出了合理的定义，并进而探讨了网壳结构失稳机理。

There are two types of maturation according to our observation.One is nucleocapsids obtained its tegument in the nucleus and enveloped from the inner nuclear membrane.Another is nucleocapsids entered cytoplasm through nuclear membrane,then obtained their tegument in the cytoplasm,enveloped from the plasma membrane,finally released by necrosis,exocytosis or other ways.

病毒成熟有两种方式：一为细胞核内核衣壳在核内获得皮层，通过核内膜获得囊膜成为成熟病毒；二为核内核衣壳通过内外核膜进入胞浆，核内和胞浆内的核衣壳在细胞浆中获得皮层，然后在各种质膜上获得囊膜，最后成熟病毒通过细胞破裂或其他方式释放到细胞外。

For the development of protein drugs and the research of biochemistry, it is significant to probe the interaction between chitosan and protein, and to observe changes of adsorption when both of them contact at interface. Total internal reflection fluorescence spectroscopy is an effective technique to investigate protein adsorption at interface.

壳聚糖对蛋白质有良好的亲和能力，研究蛋白质与壳聚糖在界面上的相互作用、理解蛋白质与壳聚糖分子在界面接触时的吸附过程变化对蛋白药物的开发和生物化学研究具有非常重要的意义。

The factors affect on the degree of substitution of product, yield and apparent viscosity, such as the mol rates of EPTAC with -NH2, reaction temperature, reaction time and the content of water in system have been discussed in detail. FTIR spectrometer and UV spectrometer are used to characterize the structure of the derivative and it is proved that substitution reaction mainly occurs on the -N element .The particle size and morphology of chitosan and quantemary ammonium salt of chitosan are analysised by comparing photos of their scanning electron microscope. The degree of substitution of HACC is determined by acid -base conductometric titration. An error in current formula of DS has pointed out and a correct formula has presented.On the base of experience of above experiment, the reaction conditions of HACC were systematically investigated through orthogonal design, and then the best conditions are found. Water-solubility and dependence of pH are studied.

壳聚糖和环氧丙基三甲基氯化铵在异相条件下发生反应，通过单因素实验，制备了一系列不同性能的壳聚糖季铵盐，本文首次详细讨论了反应条件(反应摩尔比、反应时间、反应温度、水含量)对产率及产物性能的影响；用红外光谱和核磁共振对结构进行表征分析时，发现季铵盐阳离子基以N位上取代为主；通过电镜图片对壳聚糖和季铵盐衍生物外观形貌进行对比，采用酸碱电导滴定法测定产物的取代度，并对常用取代度公式做了修正。

Based on the equipment, test results showed that: hulling rate was more than 75% and powder rate was less than 5%.

在此脱壳装置上进行的油菜籽脱壳试验结果表明，两次撞击法脱壳率大于75%，粉末率小于5

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。