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Therefore, to established acquisitive prescription system under the conditions of the socialist market economy is very necessary and urgent.

因此，在社会主义市场经济条件下设立取得时效是非常必要和迫切的。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

The aim was to investigate the process conditions of preparing the pesticide intermediate acrolein by using biological glycerol.

［目的］考察生物甘油制备农药中间体丙烯醛的工艺条件。

With the H3PW12O40/Al2O3 as catalyst, the conditions of preparing acrolein from glycerol were studied in a continuous fixed bed reactor.

同时利用常压连续流动的固定床反应器考察该催化剂对甘油制备丙烯醛的工艺条件，重点考察了催化剂的种类、杂多酸的负载量、反应温度等条件对反应的影响。

The results showed that the optimal conditions were as follows: H3PW12O40/Al2O3 exhibited high activity and selectivity at the optimal temperature 330℃ and the load content of heteropoly acid 40%, the glycerol conversion reached 100% with acrolein selectivity of 83.7%.

结果表明，由甘油制备丙烯醛的较优条件为：当催化剂为H3PW12O40/Al2O3，负载量为40%，反应温度为330℃时，丙烯醛的选择性可达83.7％，甘油的转化率为100％。

The conditions for synthesis of propyl acrylate using strong acidic resin as catalyst were studied.

另外，也与其他催化剂的催化效果进行了比较，说明了强酸性树脂在合成丙酸烯丙酯中的独特优越性。

Acrylonitrile is not completely stable under reaction conditions.

丙烯腈在反应条件下是不完全稳定的。

The catalyst of the present invention is especially suitable for use in the conditions of low reaction temperature, high reaction pressure and high propylene load, may result in high yield of acrylonitrile, and may be used in industrial production.

本发明催化剂特别适用于在较低反应温度、较高的反应压力和高丙烯负荷条件下使用，且可保持高的丙烯腈单收，可用于工业生产中。

The conditions for measuring nuclide of actinium series with γ spectrometry were discussed.

探讨了γ谱方法测定锕系各个核素的适用条件。

Our lack of knowledge about local conditions precluded determination of committee action effectiveness in fund allocation to those areas in greatest need of assistance.

由于我们不了解当地情况，无法确定委员会是否有效地向最需要援助的地区提供了资金。

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。