二重的

The results indicated that potassium diformate improved average daily gain and feed conversion rate, and the improvement is more in the first period, it also can prevent ablactation stress of the piglet on a certain extent.

研究表明，二甲酸钾改善了仔猪的日增重和料重比，尤其在饲养前期效果明显；二甲酸钾对仔猪的断奶应激有一定预防效果。

The photochemical and thermal decomposition of various diphenylamine diazonium salts in ethanol were studied. It was found that, the major products in photochemical decomposition are their corresponding substituted diphenylamino-4-ethyl ethers while their corresponding diphenylamines were obtained as only one product in the case of thermal decomposition.

并研究了二苯胺型重氮盐的光、热分解，结果表明：在醇中，二苯胺型重氮盐的光解主要生成重氮基被乙氧基取代的产物；热解几乎生成唯一的重氮基被氢取代的产物。

In the presence of the combination of sulphuric and phosphoric acid, with sodium diphenylamine sulfonate as the indicator, standard solution of potassium dichromate was used to titrate total iron value.

试样以盐酸溶解后，在酸性介质中，先以氯化亚锡将三价铁大部分还原为二价，然后在钨酸钠指示下，再以三氯化钛将剩余的三价铁还原为二价，过量的三氯化钛以重铬酸钾氧化消除干扰，在硫磷混合酸存在下，以二苯胺磺酸钠为指示剂，用重铬酸钾标准溶液滴定全铁量。

After esterification, the ethyl-2-chloro-3-phenylpropionate reacts with diethyl malonate under the catalysis of sodium ethylate, and we obtain the corresponding triethyl ester. The-benzylsuccinic acid is formed by the triethyl ester reacting with concentrate hydrochloric acid and taking place hydrolyzation and decarboxylation reaction at the same time. In order to avoid the formation of cinnamic acid, the sodium ethylate and diethyl malonate must be react sufficiently. The course has simple operation, inexpensive materials and better yield.

具体制备工艺为：首先以L-苯丙氨酸为原料采用重氮化方法得到-2-氯-3-苯基丙酸，再经酯化得到-2-氯-3-苯基丙酸乙酯后在乙醇钠催化作用下和丙二酸二乙酯缩合，发生SN2反应，得到相应的三乙酯，然后经水解和脱羧，得到-苄基丁二酸；在实验中乙醇钠要和丙二酸二乙酯充分反应，避免生成肉桂酸乙酯；该过程操作简单，原料便宜，产率较高，总收率可达到26.8%。

Also the mattock with a blade six inches wide and a shaft more than five feet long, three hundred.

共三百把；大橹刃，重八斤，柄长六尺，共三百把；带环的铁板长三足以上，共三百个；铁鎯钟头重五斤，柄长二尺以上，共一百二十把。

In the conformation change process, the second hyperpolarizability values of system and for singlet are negative system (a of 45° and 135° with the exception, and less than the absolute value of all triplets. The second hyperpolarizability values of system for singlet and triplet states are positive and in molecular close plane configuration time, the value of triplet is greater than that of the singlet.

在构象变化过程中，体系和单重态的二阶超极化率均为负值体系(a的45°和135°除外，且绝对值都小于三重态的二阶超极化率值，体系的单三重态二阶超极化率值均为正值，且在分子接近平面构型时，三重态的γ值大于单重态。

The photodegradation rate of M-PPV 1 was constrained by DABCO that quenches the triplet state of M-PPV; 2increased when the solvent changed from benzene to deuterated benzene in whichthe lifetime of triplet state is longer than that in benzene; 3 was improveddramatically with high concentration of M-PPV triplet state was generated by energytrasfer from biacetyl.

发现：1能猝灭M-PPV的三重态的1，4-二氮二环[2.2.2]辛烷也能有效地抑制光氧化反应的进行；2能提高M-PPV三重态寿命的氘代溶剂也能使M-PPV光氧化降解速率加快，3丁二酮和M-PPV间的能量传递能够提高M-PPV三重态的浓度，这和丁二酮作三重态敏化剂敏化光氧化M-PPV时，M-PPV的光降解速率大大增加也是一致的。

Finally, 4, 4'-diaminostilbene-2, 2'-disulfonic acid with high quality was synthesized from DNS after purification.

研究结果表明，适宜的重结晶温度约为85℃，优化pH值为9~10，以重结晶后所得精制DNS为原料可制备高品质4，4'-二氨基二苯乙烯－2，2'-二磺酸。

The idea of regional tourism co-operation in China has appeared since the early years of 1980s',and some outstanding achievements have been made at that time. However,reviewing the co-operations that were putting into action in China,we may find that many of the co-operations are still emphasizing the form,the study,the pronouncement,and many idea are still on the level of regional tourism administration, lacking ideographical and maneuverable and practical measures and policies.

中国区域旅游合作及大旅游的思想早在二十世纪八十年代末就已产生，并在二十多年的发展中取得了一定的成绩，但是就目前的区域旅游合作发展程度来看，现有的合作还主要是重形式、重研讨、重宣言、重宣传，许多观念还多停留在地区旅游行政管理层面上，仍缺乏具体的、可操作性强的政策、措施和手段。

The perturbational reanalysis method of repeated eigenvalues and associated eigenvectors of the lineargeneralized eigenvalue problem is further investigated on the basis of the relevant results of previous stud-ies.

本文基于已有研究结果，进一步探讨了线性广义特征值问题的重特征值及其特征向量摄动重分析理论和方法，阐述了重特征值情形下摄动重分析方法的一些重要特点，完善了重特征值的特征向量的二阶摄动算式，并论证了重特征值摄动法与相异特征值摄动法之间的统一性。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了