英语语法分析

Noscapine has been primarily used as antitussive agent for several decades.

过去几十年中，那可丁一直被用作镇咳药。

Objective: to study antitussive, expectorant and antiasthmatic actions of Qiguanye pill.

目的：研究气管炎丸的止咳、平喘、祛痰作用。

Objective: To study the effects of Xeudansu tablet on anti-inflammation and antitussive.

目的：对雪胆素片抗炎、镇咳作用进行实验研究。