英语语法分析

Divide rats into normal control group, blank control group, aspirin group, and Bitongxiao group to observe at different times Bitongxiao's effect on chemical radiculoneuritis in duplicated models.

将大鼠分为正常对照组、空白对照组、阿司匹林组、痹痛消颗粒组，在不同时间观察痹痛消对化学性神经根炎模型的影响。