英语语法分析

There are two circumoral ciliary rows on the buccal region and a dorsal row of bristles.

其腹面口区具二环围口纤毛列；背面具一列背刚毛。

Buccal have purplish blue stain.

颊部有紫蓝色斑点。

Objective:To study the analgesic effect of qingyan buccal tablets.

目的：观察清咽含片的镇痛作用。