英语语法分析

By our second century, the Romans were burning crude oil as a fumigant against caterpillars.

在我们的第二个世纪，罗马人用燃烧石油的办法来驱赶毛毛虫。

Objective: To observe the effect of sitz bath with fumigant on patients with mixed hemorrhoid surgery.

目的：观察混合痔患者应用术后薰洗方坐浴的治疗效果。

Fumigant: for storage pest control and quarantine of imports and exports points. Especially for termites.

杀虫熏蒸剂。用于仓库害虫防治和口岸进出口货物检疫，对杀灭白蚁有特效。