英汉例句

• Since no catalyst is used in the process, a product can be conveniently extracted and no waste water is produced; and the ester exchange process is simpler, safer and more efficient.

  由于过程中无催化剂，不仅产物提纯简便，而且无废水产生，酯交换过程更加简单、安全和高效。

• This complex reaction is characterized by a keto-enol tautomerism eqilibrium and ester exchange reaction .

  此螯合反应是由酮一烯醇互变异构平衡过程和酯交换反应组成。

• Butyl lactate was synthesized by the ester exchange reaction of d, L-lactide and n-butanol under the catalysis of sulfuric acid.

  研究了D,L -丙交酯在浓硫酸催化作用下与正丁醇进行酯交换反应合成乳酸丁酯的条件。

• The result shows, the ester exchange reaction did take place in PC/PET melting blend system, the extent of exchange reaction depends on content of the components, mixing temperature and mixing time.

  结果表明，PC/PET共混体系在熔融过程中有酯交换反应发生，反应程度与组分含量、熔融温度和共混时间有关。

• In a microwave reactor, the biological diesel oil is prepared from an acid esterification-alkali ester exchange two-step method.

  在微波反应器中以酸酯化-堿酯交换两步法制备生物柴油。

• The ester exchange reaction on phosphorus of N-phosphorylhistidine with primary alcohol has been studied by MNDO method.

  用MNDO方法对磷酰化组氨酸磷上酯交换反应侧链咪唑基所参与的六配位磷机理进行了研究。

• A phosphorite used as lube friction modifier was synthesized by phosphonic aryl ester and fatty alcohol using ester exchange method in laboratory.

  在实验室使用亚磷酸芳基酯与脂肪醇，利用酯交换法合成了一种亚磷酸脂肪醇酯作为润滑油摩擦改进剂。