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This essay firstly analyzes the economic and social advantages, which binged by the foreign exchange reserve, and budgets by mathematic ways the amount of the best foreign exchange reserve in 2004. The last conclusion is: the foreign exchange reserve of our country is not enough.

本文对充足外汇储备给我国经济和社会带来的有利之处进行了理论上的分析后，又采取数学方法对我国2004年最佳的外汇储备数额进行了测算，得出了一个结论：我国的外汇储备并不多。

Dorsalis by salting out, ion exchange chromatography, and gel filtration chromatography. By salting out the egg homogenate, SDS-PAGE analysis revealed that the Vns were mainly precipitated in a 50~70% ammonium sulfate solution. The salted-out proteins were further purified by ion exchange chromatography, and the result showed that Vns were mainly eluted with a 0.3~0.5 M sodium chloride gradient. Finally, the elutes of ion exchange chromatography were refined by running them through gel filtration chromatography to obtain purified Vns. SDS-PAGE separated the 48- and 51-kDa purified Vns, and used them as antigens to raise polyclonal antibodies.

利用硫酸铵盐析法初步分离果实蝇卵中的蛋白质，以SDS-PAGE蛋白质电泳分析得知，卵黄蛋白主要在硫酸铵溶液浓度为50~70%时被沉淀出；盐析沉淀所得之卵黄蛋白，再以离子交换层析法进一步纯化显示，卵黄蛋白主要会在0.3~0.5 M氯化钠的浓度范围间被析出来；再将析出液浓缩后，经凝胶过滤层析法做最后的纯化，即获得纯化之卵黄蛋白。

We found that the microstructures and magnetic properties were not influenced with depositing temperature and sputtering power. The magnetic properties were only affected by Fe layer thickness. When the Fe layer thickness is thinner than 5 nm, weak exchange coupling raised between Fe cap layer and FePt recording layer. When the thickness reached 10 nm, the strongest exchange coupling formed. Film coercivity didn't distinctly vary as Fe layer thickness is thinner than 15 nm. Consequently, we measured DCD curves and had the same conclusions. Indeed, the appearance of exchange coupling is confirmed with 10 nm Fe cap layer.

我们并发现溅镀Fe之温度与瓦数，并不会对结构或是磁性质有显著的影响，Fe厚度的改变虽然也不会改变结构，但是对Cr/Pt/FePt/Fe磁性质却有明显的变化，当Fe厚度薄时(3、5 nm)，在Fe和FePt界面仅有弱的交换耦合力产生，Fe厚度是10 nm时，此时交换耦合力为最强，厚度再增加到15、20 nm时，Hc反而略为上升，同样的我们量测DCD曲线，也证实了Fe厚度10 nm的确有交换耦合力存在。

This paper summarizes the theory merits of latest exchange rate and combines experience and lessons of other countries on the exchange rate policy, analyzing possibility of choosing the different exchange rate system for China.

本文在总结了最新汇率理论成果和吸取了其它国家在汇率政策经验上的教训的基础上，对人民币选择不同汇率制度的可能性进行了分析。

The exchange and adsorption properties of LA, FA and glu on six anion exchange resins were investigated, and the influence of the temperature was also researched, among them weakly basic ion-exchange resin 335 can provide the highest uptake capacity of LA The Freundlich equation can explain the adsorption equilibrium curves of LA on the anion resins better than the Langmuir equation.

在静态吸附性能研究部分，研究了乙酰丙酸、葡萄糖和甲酸在六种阴离子树脂上的静态吸附行为，筛选出吸附性能最好的335树脂，Freundlich方程比 Langmuir方程能更好的描述树脂对乙酰丙酸和甲酸的吸附。

With regard to anion exchange membranes,the traditional preparation method involves a much complicated process—chloromethylation,in which the commonly used chloromethyl methyl ether and bis-chloromethylether are now considered carcinogens.Therefore,it is necessary to develop new routes to prepare anion exchange membranes without such chloromethylation process.As for cation exchange membranes, mostly-perfluorinated sulfonic acid ionomers,such as Nafion~?

对于强碱性的阴离子交换膜的制备，由于传统路线中的卤甲基化步骤中不可避免的采用强致癌物质二氯甲醚，因此无论是从经济成本还是环境保护方面，开发不采用氯甲基化步骤的阴离子交换膜制备方法是目前的一个迫切要求。

At fix rate of exchange system under, the investor can reduce judgment cost and the rate of exchange motion indetermination risk of rate of exchange motion, lower investment cost with this and then produces to FDI to definitely promote a function.

在固定汇率制度之下，投资者能减少汇率波动的判断成本和汇率波动不确定性风险，以此来降低投资成本，进而对FDI产生一定的促进作用。

Sythesis and application of chlorostyrene-DVB strongly acidic cation exchange resin ;2. For this study,a series of poly( p -amino styrenes) with various amounts of supported hydrogen chloride,and a series of strongly acidic cation exchange resin s with various exchange capacity were synthesized,and their catalytic property for ketalization of cyclohexanone and glycol were investigated.

通过测定固载了不同量的氯化氢的聚和不同交换量的强酸性阳离子交换树脂催化的环己酮与乙二醇的缩酮化反应缩酮的收率，研究了聚合物固体酸催化剂的疏水性对其催化缩酮化反应性能的影响；发现在一定范围内增加催化剂的疏水性，可提高缩酮化反应的收率。

Target zone both possess those merit of hard peg and float exchange rate regime, and can harmonize exchange rate policy and money policy and realize economy interior and exterior equilibrium, meanwhile it is accordance with china step-by-step reform policy, so target zone exchange rate regime is line with china reality of the day.

汇率目标区是中国金融进一步开放中比较合适的汇率制度，它兼具固定汇率制和浮动汇率制的优点，能协调汇率政策与货币政策，实现经济的内外均衡，也符合中国渐进式的改革发展道路。

The exchange that carried on between family and clan. But further research finds that a lot of exchange systems of transition type exist between these two kinds of extremes, they different from North America and Melanesia potlach excessively extravagant to unrealistically compare already, different from another gentle present exchange competition , we often in money given to children as a lunar New year gift , banquet of giving , from wedding to fighting for size ,etc.

然而进一步的研究却发现在这两种极端之间存在着许多过渡型的交换体系，它们既不同于北美和美拉尼西亚过度铺张攀比的夸富宴，也不同于另一类温和的礼物交换竞争，而是如我们常在给压岁钱、宴会、婚礼直至简单宴请中的暗中争长短等，像德国人形容的&回报自己&，这样的温和中间交换形式在古代印欧地区尤为普遍，特别是萨斯。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。