英语语法分析

AIM: To observe the effect of paracetamol and pseudoephedrine hydrochloride drops on histamine induced increase in resistance of nasal meatus of rats.

目的：观察氨酚伪麻是否具有降低大鼠鼻通道阻力的作用。

These appear today on medications that include dextromethorphan, a cough suppressant, the expectorant guaifenesin and the decongestants phenylephrine and pseudoephedrine.

如今，镇咳药右美沙芬、祛痰药愈创甘油醚以及解充血药苯福林和伪麻黄硷的包装盒上就标注了警告。

Objective To determine simultaneously the contents of ephedrine and pseudoephedrine in ephedra herb and its compound preparations by high-performance liquid chromatography.

目的用反相高效液相色谱梯度洗脱法测定麻黄及其复方制剂中麻黄类生物碱的含量。