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The related reaction conditions and factors such as catalysis of some catalysts etc were discussed. In the procedures, 2-pentylidene cyclopentanone intermediate, which could be isomerizated into a 2-pentyl cyclopentenone under acidic conditions, was effectively prepared in the presence of a phase transfer promotor.

讨论了正戊醛和环戊酮在碱性条件下缩合生成2-亚戊基环戊酮的反应温度、碱浓度、相转移催化剂等因素对反应的影响。2-亚戊基环戊酮中间体化合物能在酸催化剂作用下，异构成2-戊基环戊烯酮，其中酸浓度和溶剂等参数对反应影响明显。

Changes in Xc for different pulp cellulose fibers are not the same during the ultrasonic treatment. Crystallization and decrystallization may both exist during the treatment at the conditions of lower-intensity ultrasonic wave. After treatment with ultrasonic Xc of MBKP cellulose is decreased and that of EBKP is increased. The changes of Xc of different pulp cellulose are more closely correlated to the fibers' morphology size and the cavitation state. The maximum Xc of 84% is obtained when BEKP cellulose is treated under the conditions of ultrasonic frequency f=23-25kHz, power=400w, and treatment time t=720s.

不同原料来源的纤维素纤维，由于形态尺寸和超分子结构的差异，经超声波处理后超分子结构表现出不同的变化规律；超声波处理过程中，结晶和消晶两种作用同时存在；超声波功率对纤维素的结晶度有较大的影响，对晶体尺寸有一定程度的影响，但结晶度Xc与超声功率没有线性关系；在频率为23-25kHz，功率为400W条件下，对桉木漂白浆纤维进行超声波处理，可获得高结晶度（84%）的纤维素样品。

From actual conditions,the author analyses the conditions,charac-teristics,reasons and harmfulness of the expensive demandable infla-tion appeared in China after the Reforms,with a great number ofdata through serious research,and puts forward the supposes ofrectifying the inflation of income.

本文从实际出发，通过认真的调查研究，运用大量的数据分析了改革后中国出现的消费需求膨胀的状况、特点、原因及其危害，并提出了治理收入膨胀的对策思路。

In our country, celebrates the Spring Festival is our country Han Nationality and some brotherly nationality most grand holiday, is head of the lunar calendar new year old, Spring Festival period, from the lunar New Year's Eve to the end of the month, the taboo are most, the people also believe devotionally, this had reflected fully the people pursue the social psychology which joyful, makes use of favorable conditions and avoid unfavorable conditions, is also adjusts the people using the taboo to live each kind of relations.

在我们国家，过春节是我国汉族和一些兄弟民族最隆重的节日，是农历新岁之首，春节期间，从除夕到正月末，禁忌最多，人们也信仰得最虔诚，这充分反映了人们追求快乐、趋利避害的社会心理，也是利用禁忌来调整人们生活中的各种关系。

This work, concentrated on the asymmetric allylation of aldehydes controlled by different chiral auxiliaries prepared from rotational pure tartaric acid, can be divided into three parts.The first part aims to review the developments of chiral drugs and asymmetric synthesis, from which derived the present research topic backgrounds and works.Synthesis and applications of allylation from aldehydes are the second part of the thesis. By optimizing the reaction conditions, such as solvents, temperature, time and chiral auxiliaries like N,N\'-dibenzyl tartamide, N,N\'-p-dimethylphenyl tartamide, N,N\'-o-dimethylphenyl tartamide, N,N\'-o-dichlorophenyl tartamide, N,N\'-a-dinaphyl tartamide, N,N\'-dicyclohexyl tartamide and N,N\'-diphenyl tartamide, ideal experimenttal conditions are obtained according to HPLC monitoring, as well as the auxiliaries\' recoveries experiments. Starting from benzaldehyde and 3-bromopropaldehyde, N,N\'-dibenzyl tartamide is considered the best auxiliary in this reaction.

本文介绍了醛的不对称烯丙基化反应，以光学纯酒石酸为原料，研究了不同构型手性配体在醛的烯丙基化反应中的立体选择性，全文共分三部分十个章节：第一部分对当前手性药物和手性技术进行了概述，并由此展开了本文的研究背景和任务；第二部分为有机合成部分，对醛的不对称烯丙基化反应进行了深入探讨，以苯甲醛为原料对反应条件进行优化，在优化的反应条件下对制备的七种可回收手性酰胺配体(N-苄基酒石酸二酰胺、N-对甲苯基酒石酸二酰胺、N-邻甲苯基酒石酸二酰胺、N-邻氯苯基酒石酸二酰胺、N-a-萘基酒石酸二酰胺、N-环己基酒石酸二酰胺和N-苯基酒石酸二酰胺)进行筛选，优化配体回收实验条件，最终确定出N-苄基酒石酸二酰胺在苯甲醛的不对称烯丙基化反应中具有较大优越性，结晶回收的手性配体光学纯度保持不变。

The relationships among simulated objective acoustics parameters are discussed and analyzed. The experimental results of Chinese speech intelligibility are compared and analyzed under diotic and dichotic listening conditions with earphone and loudspeaker reproduction. The relationships between Chinese speech intelligibility scores and objective acoustics parameters are also studied and analyzed under above two listening conditions.

通过软件仿真，探讨分析仿真结果之间的关系；比较分析了采用耳机、扬声器重放在双耳无差别听闻和双耳有差别听闻条件下的汉语语言清晰度主观评价结果；探讨、分析客观声学参数与两种听闻条件下的汉语语言清晰度得分之间的关系和规律。

"Any decision-whether made by government, by a corporation, or by an in dividual person-must takesintosaccount future conditions more than present conditions."

一个决策，不管政府、企业抑或个人做出的，都应该考虑将来的情形多于目前的情形。

"Any decision-whether made by government, by a corporation, or by an in dividual person-must take into account future conditions more than present conditions."

一个决策，不管政府、企业抑或个人做出的，都应该考虑将来的情形多于目前的情形。

In addition, AM fungi from a wide range of environmental conditions (originally isolated from north, central and south China) were used to study the ecological adaptability of AM fungi and the influence of edaphic conditions on AM fungal growth and metabolic activity.

丛枝菌根共生体由宿主植物和真菌共同组成，菌根真菌的生长、代谢活性、菌丝分布以及生态适应性等特征不但与菌根效应、菌根真菌的生态功能密切相关，而且受到宿主植物和土壤条件的影响。

Its mechanism is the use of anthraquinone in alkali conditions off proton surface forming 10 more stable carbon anion face, but because carbon anion and oxygen ion exist between testosterone and enolate type each other changes, cause reaction product complex, at least five, reaction selectivity, product yield, separation difficulties, and product purity is not high, therefore, using the type and quantity of alkali, phase transfer catalyst type, solvent, to optimize the selection process conditions so as to improve the yield target product.

其机理是利用蒽酮在碱存在的条件下脱去氢质子面形成10位较稳定的碳负离子面进行，但是因为碳负离子和氧负离子之间存在酮式和烯醇式的互变，导致反应复杂，产物至少有五种，反应选择性差，产物分离困难，产率低，且产品纯度不高，因此，利用对碱的种类和量的多少，相转移催化剂的种类，反应溶剂的选择，来优化反应工艺条件从而提高目标产物的产率。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。