1. What are the chemical reaction characteristics of tropane alkaloids?
   氢溴酸东莨菪碱的鉴别原理是什么？
2. The heat brings about a chemical reaction, and oxygen is liberated.
   热量引起化学反应, 释放出氧气。
3. A catalyst is a substance which speeds up a chemical reaction.
   催化剂是一种能加速化学反应的物质。
4. We imagine using an anticatalyst to "freeze out" any chemical reactions in the system.
   可想象利用一种反催化剂使体系内的任意化学反应“冻结”。
5. The ageing depeion of nitrate-poetherthased Polyurethans were studied by means of swellingtheory of polymere and chemical reaction kinetics.
   运用聚合物的溶胀理论和化学反应动力学，研究了硝酸酯基聚醚聚氨酯的老化降解过程。
6. Chemical laser is characteristically energized by an exoergic chemical reaction which produces the nece ssary population inversion of lasing species.
   化学激光器是以释能化学反应提供能源, 并且以化学反应产生粒子数反转为基础的。
7. The gas-solid reaction mechanism was studied in the tank reactor.It was found that the reaction rate was controlled by the interdiffusion and intrinsic chemical reaction.
   在釜式反应器内研究了氯磺化反应的气固相反应机理，发现气体的内扩散和本征化学反应是氯磺化反应的控制步骤。

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