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The separation and purification technologies of amino acid,such as: precipitation ,ion-exchange,extraction and membrane separation were reviewed.

总结了氨基酸分离纯化过程中常用的技术，如沉淀法、离子交换法、萃取法和膜分离法，介绍了各种技术的基本原理、特点和发展动态。

Large amount of acid radical ion of acid salt can coexist or not in the solution depends on whether they have proton transfer reaction.

一般酸式酸根离子在溶液中能否大量共存，主要看它们之间能否发生质子转移反应。

Acetobacillus spp can transform carbohydrate to acetic acid radical ion, increase the amount of milk and improve its quality.

醋酸菌发酵后可将糖类转变成醋酸根离子，增加泌乳量，及改善乳质。

This paper proposes that weak acid is a coordination compound that regards hydrogen ion as "coordination body" and regards acid radical as central atom.

本文首次提出将弱酸看成是以氢离子为"配体"，以弱酸的酸根为中心"原子"所形成的"配合物"，通过计算该"配合物"的生成函数N并绘制PH－N图，用Bjerrum，N。

The metal ion and the anion of the mineral acid form an insoluble salt.

金属离子和无机酸的阴离子生成一种难溶的盐。

Because acid rain can transport excessive hydrogen ion into the soil, then cause decrease of pH value and cation saturation, accelerate acidify of soil, therefore, it is significant to study the ecological effects of combined pollution for heavy metals under intimidation of acid rain in the regions where acid rain often take place.

土壤吸附-解吸试验的土壤按照既定方案处理后，在25±1℃，土壤水分20％左右条件下培养2个月，待重金属元素与土壤的反应基本稳定后制样进行等温吸附—解吸试验，研究紫色土在单一及复合条件下镉、锌的吸附特征和酸雨胁迫下的解吸特征以及此条件下吸附一解吸与镉、锌生物有效性的关系。

The structures, functions and anticoagulant mechanisms of anticoagulation factors ACF I and ACF II from the venom of Agkistrodon acutus have been investigated. Both ACF I and ACF II form a 1:1 complex with activated coagulation factor X in a Calcium ion-dependent fashion which prevents the interaction of FXa with other proteins in the coagulation process, therefore ACF I and ACF II have marked anticoagulant activity.

中文摘要：对尖吻蝮蛇毒中抗凝血因子ACF I和ACF II的结构、功能和抗凝机理等进行了深入研究，发现ACF I和ACF II均与活化凝血因子X结合成1：1的复合物，从而阻止了FXa进一步参加凝血过程中反应，因而具有显著的抗凝血活性。

Both ACF I and ACF II form a 1:1 complex with activated coagulation factor X in a Calcium ion-dependent fashion which prevents the interaction of FXa with other proteins in the coagulation process, therefore ACF I and ACF II have marked anticoagulant activity.

对尖吻蝮蛇毒中抗凝血因子ACF I和ACF II的结构、功能和抗凝机理等进行了深入研究，发现ACF I和ACF II均与活化凝血因子X结合成1：1的复合物，从而阻止了FXa进一步参加凝血过程中反应，因而具有显著的抗凝血活性。

The rare earth ion has been widely applied to as an activator in luminescent materials.

稀土离子作为激活剂在发光材料中得到广泛的应用。

052 Describes and claims a body of polycrystalline dielectric ceramic material having a lead zirconate--lead titanate--lead stannate composition falling within the area A B C E F of the triaxial diagram 1d of the drawings accompanying this specification and containing at least one substitutional additive ingredient selected from the group consisting of elements having respective ionic radii sufficiently close to the ionic radius of one of the elements lead, tin, titanium, zirconium and oxygen to permit of substitution, and a valence state differing from that of said one element by less than three units, the aggregate quantity of additive ingredient amounting to from 0.1 to 5 percent of the replaced ion on an atom basis, each additive ingredient present in said material being in ionic form and substituting for a finite percentage of the ions of a particular one of the elements lead, tin, titanium, zirconium and oxygen with respect to which it conforms with regard to ionic radius and valence state, said additive ingredient replacing a quantity of said elements having in the aggregate an equal number of valence units.

参考译文：第 1012052 号专利说明书介绍一种含有锆酸铅，钛酸铅，锡酸铅的多晶陶瓷介质材料，其组成在说明书附图 ld 三元相图中处于 A B C E F 区域内，该组成至少还含有一种置换添加物，这种添加物从一组离子半径分别接近于铅，锡，钛，锆，氧的元素中选出，以利于互相置换，而与上述一种元素化合价之差应小于三价。该添加物的总量为被置换离子的 0.1%~5%克原子。上述材料中的每种添加物是以离子形式存在的，它以一定的百分数置换铅，锡，钛，锆，氧中的某一元素的离子。添加物在离子半径和价数上必须类似于上述任一元素，并且置换添加物的量与被置换的元素在总体上具有相等的化合价数。本句由两个简单句构成，一个主句，另一个是定语从句。

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。